Opinion & Analysis
The Science of Mud Balls (and predicting their flight)
Recently, I had a few people ask whether we have done any research at Ping on the effects of mud on a golf ball, or “mud balls.” It turns out that one of our engineers had encountered a significant amount of mud on the right side of his ball in a tournament earlier this year. Unsure what the effect on ball flight would be, he aimed for the middle of the green and watched his ball draw into the rough, well left of the green. This spurred a debate as to whether the effect of mud on ball flight could be consistently predicted.
We did some theoretical analysis, which showed that mud on the right side of the ball should almost always cause the resultant ball flight to curve to the left. The main reason is aerodynamics – a golf ball with no dimples on the right would also curve to the left. The question is – with mud, is this effect measurable and repeatable?
To test our hypothesis we set up a G30 4-iron on our Ping Man robot and set the swing characteristics to a faster swing-speed player. The club speed prior to impact was set to 95 mph, leading to center hits carrying a little over 220 yards with a Titleist Pro V1x ball. We then teed up a number of balls with mud caked on different areas. Some had mud covering the entire surface of the ball, while others had mud applied to one area – either the front, back, top, bottom, left or right side of the ball.
We used a lot of mud to try to maximize the effect and get the most measurable results. However, our high-speed video analysis of impact showed that much of the mud fell off the ball immediately, regardless of how much mud we applied.
A short statistics lesson is needed to interpret the results. Ping Man is extremely consistent and so usually no more than three shots are needed in any configuration to establish a reliable set of data. In our bar charts, the average of the three shots is the bar itself, while the “error bars” on either side of the bar show what we call a 95 percent confidence interval. This means we are 95 percent confident that if we took 1,000 or even 1 million shots on Ping Man, the average would fall in this interval.
The more shots you take, and the more repeatable the data, the smaller the error bars are. If you look at 2 bars where the error bars overlap, this means there is no statistically significant difference and a correct statement is that the averages are “broadly the same.” If there is a clear gap between error bars, the statistical conclusion is that there is almost certainly a real difference in the averages.
Does mud on the right of the ball cause it to bend consistently in one direction?
The average offline distance for a clean ball, a ball covered in mud, and balls with mud on the left or right.
The answer is categorically yes. Figure 1 shows that balls with mud on the right ended up around 25 yards left of the target on average – a statistically significant result. Likewise, with mud on the left, the ball ended up around 25 yards right of the target. With mud all over, the balls ended up statistically no different to the clean balls. You can see that the error bars are much wider for all of the mud balls than the clean balls. The mud is making the ball flight less consistent, which is no surprise. However, the take home message is that if you find your ball on the fairway with mud on the right side, aim right of your target and you can be confident that the ball will curve a long way to the left. This was tested by one of our engineers in competition not long after we conducted the test and he was able to aim right with confidence and find the middle of the green.
Does mud on the ball cause it to fly shorter?
Figure 2: Average carry distance for a range of different mud conditions when compared with a clean ball.
Figure 2 shows the carry distance of all the configurations we tested. There was a significant drop in distance for all of the mud balls, but the most dramatic drop by far occurred when mud interfered with the club-ball interaction. With mud on the back or bottom of the ball, the club impacts mud before the ball and — no surprise — mud is not great for energy transfer. Even when mud does not get in the way of the club, ball speed is lower, which is a result of some of the energy in the club head going toward accelerating mud rather than the ball. The message here is: Take an extra club if there is a lot of mud on the ball, maybe even a couple of extra clubs. Our test shows the extreme case because we used a lot of mud, but the effect will exist whenever there is an impediment like mud on the ball.
This kind of little experiment reminds me how fortunate I am to work in an engineering department where if we have a question based on observations during a round, we have all the tools at our disposal to answer that question in a systematic and reliable way. I hope this helps shed a little light on what you can do if you’re unfortunate enough to find mud on your ball during a round.
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19th Hole
Vincenzi’s LIV Golf Singapore betting preview: Course specialist ready to thrive once again
After another strong showing in Australia, LIV Golf will head to Sentosa Golf Club in Singapore looking to build off of what was undoubtedly their best event to date.
Sentosa Golf Club sits on the southern tip of Singapore and is one of the most beautiful courses in the world. The course is more than just incredible scenically; it was also rated 55th in Golf Digest’s top-100 courses in 2022-2023 and has been consistently regarded as one of the best courses in Asia. Prior to being part of the LIV rotation, the course hosted the Singapore Open every year since 2005.
Sentosa Golf Club is a par 71 measuring 7,406 yards. The course will require precise ball striking and some length off the tee. It’s possible to go low due to the pristine conditions, but there are also plenty of hazards and difficult spots on the course that can bring double bogey into play in a hurry. The Bermudagrass greens are perfectly manicured, and the course has spent millions on the sub-air system to keep the greens rolling fast. I spoke to Asian Tour player, Travis Smyth, who described the greens as “the best [he’s] ever played.”
Davis Love III, who competed in a Singapore Open in 2019, also gushed over the condition of the golf course.
“I love the greens. They are fabulous,” the 21-time PGA Tour winner said.
Love III also spoke about other aspects of the golf course.
“The greens are great; the fairways are perfect. It is a wonderful course, and it’s tricky off the tee.”
“It’s a long golf course, and you get some long iron shots. It takes somebody hitting it great to hit every green even though they are big.”
As Love III said, the course can be difficult off the tee due to the length of the course and the trouble looming around every corner. It will take a terrific ball striking week to win at Sentosa Golf Club.
In his pre-tournament press conference last season, Phil Mickelson echoed many of the same sentiments.
“To play Sentosa effectively, you’re going to have a lot of shots from 160 to 210, a lot of full 6-, 7-, 8-iron shots, and you need to hit those really well and you need to drive the ball well.”
Golfers who excel from tee to green and can dial in their longer irons will have a massive advantage this week.
Stat Leaders at LIV Golf Adelaide:
Fairways Hit
1.) Louis Oosthuizen
2.) Anirban Lahiri
3.) Jon Rahm
4.) Brendan Steele
5.) Cameron Tringale
Greens in Regulation
1.) Brooks Koepka
2.) Brendan Steele
3.) Dean Burmester
4.) Cameron Tringale
5.) Anirban Lahiri
Birdies Made
1.) Brendan Steele
2.) Dean Burmester
3.) Thomas Pieters
4.) Patrick Reed
5.) Carlos Ortiz
LIV Golf Individual Standings:
1.) Joaquin Niemann
2.) Jon Rahm
3.) Dean Burmester
4.) Louis Oosthuizen
5.) Abraham Ancer
LIV Golf Team Standings:
1.) Crushers
2.) Legion XIII
3.) Torque
4.) Stinger GC
5.) Ripper GC
LIV Golf Singapore Picks
Sergio Garcia +3000 (DraftKings)
Sergio Garcia is no stranger to Sentosa Golf Club. The Spaniard won the Singapore Open in 2018 by five strokes and lost in a playoff at LIV Singapore last year to scorching hot Talor Gooch. Looking at the course setup, it’s no surprise that a player like Sergio has played incredible golf here. He’s long off the tee and is one of the better long iron players in the world when he’s in form. Garcia is also statistically a much better putter on Bermudagrass than he is on other putting surfaces. He’s putt extremely well on Sentosa’s incredibly pure green complexes.
This season, Garcia has two runner-up finishes, both of them being playoff losses. Both El Camaleon and Doral are courses he’s had success at in his career. The Spaniard is a player who plays well at his tracks, and Sentosa is one of them. I believe Sergio will get himself in the mix this week. Hopefully the third time is a charm in Singapore.
Paul Casey +3300 (FanDuel)
Paul Casey is in the midst of one of his best seasons in the five years or so. The results recently have been up and down, but he’s shown that when he’s on a golf course that suits his game, he’s amongst the contenders.
This season, Casey has finishes of T5 (LIV Las Vegas), T2 (LIV Hong Kong), and a 6th at the Singapore Classic on the DP World Tour. At his best, the Englishman is one of the best long iron players in the world, which makes him a strong fit for Sentosa. Despite being in poor form last season, he was able to fire a Sunday 63, which shows he can low here at the course.
It’s been three years since Casey has won a tournament (Omega Dubai Desert Classic in 2021), but he’s been one of the top players on LIV this season and I think he can get it done at some point this season.
Mito Pereira +5000 (Bet365)
Since Mito Pereira’s unfortunate demise at the 2022 PGA Championship, he’s been extremely inconsistent. However, over the past few months, the Chilean has played well on the International Series as well as his most recent LIV start. Mito finished 8th at LIV Adelaide, which was his best LIV finish this season.
Last year, Pereira finished 5th at LIV Singapore, shooting fantastic rounds of 67-66-66. It makes sense why Mito would like Sentosa, as preeminent ball strikers tend to rise to the challenge of the golf course. He’s a great long iron player who is long and straight off the tee.
Mito has some experience playing in Asia and is one of the most talented players on LIV who’s yet to get in the winner’s circle. I have questions about whether or not he can come through once in contention, but if he gets there, I’m happy to roll the dice.
Andy Ogletree +15000 (DraftKings)
Andy Ogletree is a player I expected to have a strong 2024 but struggled early in his first full season on LIV. After failing to crack the top-25 in any LIV event this year, the former U.S. Amateur champion finally figured things out, finished in a tie for 3rd at LIV Adelaide.
Ogletree should be incredible comfortable playing in Singapore. He won the International Series Qatar last year and finished T3 at the International Series Singapore. The 26-year-old was arguably the best player on the Asian Tour in 2023 and has been fantastic in the continent over the past 18 months.
If Ogletree has indeed found form, he looks to be an amazing value at triple-digit odds.
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In Tampa, there is a golf course that boasts carts that do not work, a water range, and a group of players none of which have any chance to break 80. The course is overseen by a staff of crusty men who have succeeded at nothing in life but ending up at the worst-run course in America. However, this place is no failure. With several other local courses going out of business — and boasting outstanding greens — the place is booked full.
While I came for the great greens, I stayed to watch our resident instructor; a poor-tempered, method teacher who caters to the hopeless. At first, it was simply hilarious. However, after months of listening and watching, something clicked. I realized I had a front-row seat to the worst golf instructor in America.
Here are some of my key takeaways.
Method Teacher
It is widely accepted that there are three types of golf instructors: system teachers, non-system teachers, and method teachers. Method teachers prescribe the same antidote for each student based on a preamble which teachers can learn in a couple day certification.
Method teaching allows anyone to be certified. This process caters to the lowest caliber instructor, creating the illusion of competency. This empowers these underqualified instructors with the moniker of “certified” to prey on the innocent and uninformed.
The Cult of Stack and Jilt
The Stack and Tilt website proudly boasts, “A golfer swings his hands inward in the backswing as opposed to straight back to 1) create power, similar to a field goal kicker moving his leg in an arc and 2) to promote a swing that is in-to-out, which produces a draw (and eliminates a slice).”
Now, let me tell you something, there is this law of the universe which says “energy can either be created or destroyed,” so either these guys are defying physics or they have no idea what they are taking about. Further, the idea that the first move of the backswing determines impact is conjecture with a splash of utter fantasy.
These are the pontifications of a method — a set of prescriptions applied to everyone with the hope of some success through the placebo effect. It is one thing for a naive student to believe, for a golf instructor to drink and then dispel this Kool-Aid is malpractice.
Fooled by Randomness
In flipping a coin, or even a March Madness bet, there is a 50-50 chance of success. In golf, especially for new players, results are asymmetric. Simply put: Anything can happen. The problem is that when bad instructors work with high handicappers, each and every shot gets its own diagnosis and prescription. Soon the student is overwhelmed.
Now here’s the sinister thing: The overwhelming information is by design. In this case, the coach is not trying to make you better, they are trying to make you reliant on them for information. A quasi Stockholm syndrome of codependency.
Practice
One of the most important scientists of the 20th century was Ivan Pavlov. As you might recall, he found that animals, including humans, could be conditioned into biological responses. In golf, the idea of practice has made millions of hackers salivate that they are one lesson or practice session from “the secret.”
Sunk Cost
The idea for the worst golf instructor is to create control and dependency so that clients ignore the sunk cost of not getting better. Instead, they are held hostage by the idea that they are one lesson or tip away from unlocking their potential.
Cliches
Cliches have the effect of terminating thoughts. However, they are the weapon of choice for this instructor. Add some hyperbole and students actually get no information. As a result, these players couldn’t play golf. When they did, they had no real scheme. With no idea what they are doing, they would descend into a spiral of no idea what to do, bad results, lower confidence, and running back to the lesson tee from more cliches.
The fact is that poor instruction is about conditioning players to become reliant members of your cult. To take away autonomy. To use practice as a form of control. To sell more golf lessons not by making people better but through the guise that without the teacher, the student can never reach their full potential. All under the umbrella of being “certified” (in a 2-day course!) and a melee of cliches.
This of course is not just happening at my muni but is a systemic problem around the country and around the world, the consequences of which are giving people a great reason to stop playing golf. But hey, at least it’s selling a lot of golf balls…
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The PGA TOUR heads to New Orleans to play the 2023 Zurich Classic of New Orleans. In a welcome change from the usual stroke play, the Zurich Classic is a team event. On Thursday and Saturday, the teams play best ball, and on Friday and Sunday the teams play alternate shot.
TPC Louisiana is a par 72 that measures 7,425 yards. The course features some short par 4s and plenty of water and bunkers, which makes for a lot of exciting risk/reward scenarios for competitors. Pete Dye designed the course in 2004 specifically for the Zurich Classic, although the event didn’t make its debut until 2007 because of Hurricane Katrina.
Coming off of the Masters and a signature event in consecutive weeks, the field this week is a step down, and understandably so. Many of the world’s top players will be using this time to rest after a busy stretch.
However, there are some interesting teams this season with some stars making surprise appearances in the team event. Some notable teams include Patrick Cantlay and Xander Schauffele, Rory McIlroy and Shane Lowry, Collin Morikawa and Kurt Kitayama, Will Zalatoris and Sahith Theegala as well as a few Canadian teams, Nick Taylor and Adam Hadwin and Taylor Pendrith and Corey Conners.
Past Winners at TPC Louisiana
- 2023: Riley/Hardy (-30)
- 2022: Cantlay/Schauffele (-29)
- 2021: Leishman/Smith (-20)
- 2019: Palmer/Rahm (-26)
- 2018: Horschel/Piercy (-22)
- 2017: Blixt/Smith (-27)
2024 Zurich Classic of New Orleans Picks
Tom Hoge/Maverick McNealy +2500 (DraftKings)
Tom Hoge is coming off of a solid T18 finish at the RBC Heritage and finished T13 at last year’s Zurich Classic alongside Harris English.
This season, Hoge is having one of his best years on Tour in terms of Strokes Gained: Approach. In his last 24 rounds, the only player to top him on the category is Scottie Scheffler. Hoge has been solid on Pete Dye designs, ranking 28th in the field over his past 36 rounds.
McNealy is also having a solid season. He’s finished T6 at the Waste Management Phoenix Open and T9 at the PLAYERS Championship. He recently started working with world renowned swing coach, Butch Harmon, and its seemingly paid dividends in 2024.
Keith Mitchell/Joel Dahmen +4000 (DraftKings)
Keith Mitchell is having a fantastic season, finishing in the top-20 of five of his past seven starts on Tour. Most recently, Mitchell finished T14 at the Valero Texas Open and gained a whopping 6.0 strokes off the tee. He finished 6th at last year’s Zurich Classic.
Joel Dahmen is having a resurgent year and has been dialed in with his irons. He also has a T11 finish at the PLAYERS Championship at TPC Sawgrass which is another Pete Dye track. With Mitchell’s length and Dahmen’s ability to put it close with his short irons, the Mitchell/Dahmen combination will be dangerous this week.
Taylor Moore/Matt NeSmith +6500 (DraftKings)
Taylor Moore has quickly developed into one of the more consistent players on Tour. He’s finished in the top-20 in three of his past four starts, including a very impressive showing at The Masters, finishing T20. He’s also finished T4 at this event in consecutive seasons alongside Matt NeSmith.
NeSmith isn’t having a great 2024, but has seemed to elevate his game in this format. He finished T26 at Pete Dye’s TPC Sawgrass, which gives the 30-year-old something to build off of. NeSmith is also a great putter on Bermudagrass, which could help elevate Moore’s ball striking prowess.
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Graham
Apr 1, 2016 at 11:25 am
Intriguing stuff. One question I’d like to ask is “why doesn’t mud detach instantly once a ball is struck?” If I want to get mud off my shoes I bang them together, and I’d imagine the energy imparted to a golf ball on being struck is of a larger order.
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Max
Dec 17, 2015 at 8:37 pm
This is good info to know but I, personally, avoid this problem by playing winter rules all year.
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Steve Thomas
Dec 17, 2015 at 2:53 pm
This is an excellent article. I would like to know what happens to a ball after you have hit a cart path. Most of the time I just buff them out using the strap on my golf cart, kind of like sandpaper, but on some occasions when the ball hits an asphalt cart path, then it’s really scuffed up too bad to use and I just put those balls in my shag bag.
birdeez
Dec 17, 2015 at 10:02 am
i’d love to ask those labeling this as shank why they do so….tough to please or just complete jerks. this type of article is what makes wrx unique and the number one site in golf. i’m sure you prefer golf digest articles on how to cure your slice for the umpteenth time.
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viking62
Dec 16, 2015 at 6:28 pm
so if there is mud on the right side of the ball – your average right handed golfer should hit the ball much straighter. Maybe someone should make a ball that acts like a ball with mud on the right hand side.
Da
Dec 17, 2015 at 2:11 am
And how would you use that in the fairway or rough? You would only be able to use it off the tee. And how would that affect roll on the green, you thunk?
What a dumbazz
vikings62
Dec 17, 2015 at 8:46 pm
It was a joke dimwit
Scooter McGavin
Dec 17, 2015 at 6:52 am
They do make those. They’re called Polara golf balls and have dimple patterns that make them fly straight. Non-conforming, though.
Matthew Bacon
Dec 16, 2015 at 5:59 pm
I liked the article and echo the sentiments about wondering how scuffs affect the flight
Da
Dec 17, 2015 at 2:12 am
Just think “range balls” and you’ll get the idea
Jack Nash
Dec 16, 2015 at 5:53 pm
What’s a mud ball? When you go and identify your ball you inadvertently brush off the blob when you place it back down. ????
Big t off 2
Dec 16, 2015 at 5:07 pm
Think Jordan should learn how to read first before putting his big golf shoe in it you silly boy!
Great advice for us novice golfers @ this time of year…
8thehardway
Dec 16, 2015 at 4:11 pm
A Hall of Fame article that should be pinned somewhere for permanent exposure.
Scott
Dec 17, 2015 at 3:25 pm
+1
Shank you very much
Dec 16, 2015 at 3:09 pm
After reading this and seeing 3 “shanks” with no comments I have to believe that there are people out there that just shank these articles to be a douche. Don’t understand why someone wouldn’t just clean the mud off the ball before playing a shot? Can’t swing fast enough to notice the difference? Slice so bad that a watermelon sized clump of mud on the ball doesn’t make a difference?
jc
Dec 16, 2015 at 4:16 pm
duh, because you can’t clean the ball if it is not on the green? read a rules book.
JZ
Dec 16, 2015 at 4:35 pm
Um, I think that was Shank’s point. 3 people shanked the article with no comment. His 3 reasons were why they could possibly do this – thereby implying one of those 3 didn’t know the rule and just assumed you’d clean the ball. And, you’re assessment isn’t completely accurate as there are times you can clean your ball. Lift, clean and place, anyone? Before you shank on someone, maybe you should take the time to try to understand what they said.
Jeff*
Dec 17, 2015 at 4:31 pm
Well, the rules of golf. Some folks are cursed by integrity.
Steven
Dec 16, 2015 at 3:05 pm
Great article. I really liked seeing the statistics.
Da
Dec 17, 2015 at 2:13 am
Ditto
Forsbrand
Dec 16, 2015 at 2:55 pm
A story from Phil Mickelsons College golf days – Phil is playing a guy called Manny Zerman, Phil calls Manny over asks for relief as his ball has muck on the side of it. Manny says sorry no you’ll have to play it as it is. Phil says ok no problem hits an exaggerated in to out swing and hooks the ball 25 yards through the air and holes it for an eagle. Zermans coach walking with the match calls manny over and tells him next time Phil Mickelson asks for relief you give it to him ok?!
Jordan
Dec 16, 2015 at 2:29 pm
I love that you tried to use REAL statistics as empirical evidence but creating a 95% confidence interval off of 3 swings is pretty dumb. Why not just take the generally accepted 30 observations so you can have realistic statistical inference.
Paul Wood
Dec 17, 2015 at 7:53 pm
Jordan – you make a fair point. 3 swings in general is not very many. To be honest, if I was doing this test for a research paper I’d certainly hit more balls, and I’d also want to repeat with more different swings and on different days, but this was really to satisfy some curiosity at our end. The statistics are real though. The confidence interval takes into account the number of swings and so it’s inherently bigger for 3 swings than 5 or 10 or 30. Part of what makes PING Man valuable is that he is so consistent we can hit 3 shots and see statistical significance in most tests. This particular test played to his strength extremely well. We just set up one swing and all we changed was the ball.
Jordan
Dec 17, 2015 at 7:59 pm
Very good. Thanks for the reply! Forgot about the precision of “Ping Man”. I’d love to see you guys further pursue this with a bigger sample so we maybe bring that confidence interval into a ultra small range
Stretch
Dec 18, 2015 at 11:57 am
I would like to see the test add off center hits to see if the ball reacts in a more extreme way.
Max
Dec 16, 2015 at 2:27 pm
Awesome. As a lifetime golfer and an engineer, I can say this is one of the best pieces I’ve ever seen on here. Thank you, Paul.
ParHunter
Dec 16, 2015 at 12:49 pm
Now that is an article that is relevant for the normal golfer at this time of the year! Thank you.
Double Mocha Man
Dec 16, 2015 at 12:32 pm
I always have mud on the back of the ball, thus I smoosh it against the ball at impact and get “knuckleballs”.
Chuck
Dec 16, 2015 at 12:31 pm
This is so cool. I always wonder, how much tour players read GolfWRX. I expect that about 500 of the best players in the world will all read this and talk about it on the range. And that every single caddy will have a discussion about it, with their boss or with other caddies.
JP
Dec 17, 2015 at 9:31 pm
Tour players already know what mud does to their golf balls, and how to play them. There are very few shots tour pros have not encountered or don’t know how to play….
alexdub
Dec 16, 2015 at 12:04 pm
This is why I will always play Ping… Innovation and explanation through passion for the game.
Mat
Dec 16, 2015 at 11:52 am
THIS is why we come here. Fantastic information! Here’s to lift-clean-replace being in effect…
Ian
Dec 16, 2015 at 11:35 am
Needed to know this about a week ago – my course had a lot of rain and I had plenty of mud balls. I was just trying to find fairways so I could lift, clean and cheat.
+2 man
Dec 16, 2015 at 10:24 am
Great analysis. I’ve always wondered about the “Ball will fly away from the mud” common advice, given the rotation of the ball in flight.
Curious about the mud on the bottom causing such a significant distance loss compared to all the others that don’t directly interfere with contact. I wouldn’t have expected that.
Emb
Dec 16, 2015 at 4:49 pm
Since they’ve shown mud to cause to ball to curve in the opposite direction of where the mud is attached I would guess mud on the bottom reduces backspin so severely that the ball just fell out of the air very quickly and lost a ton of carry distance
Progolfer
Dec 16, 2015 at 10:09 am
Fantastic article!
Ben
Dec 16, 2015 at 9:47 am
Very interesting! Great to see statistical data on this. This is knowledge I can directly apply on the course. Thanks!