Esteemed coach Pete Cowen believes Phil Mickelson was making a statement to U.S. Open organisers and saying, "Don't make us look stupid" with his controversial antics at an "outrageous" Shinnecock Hills course on Saturday.
Mickelson caused a storm when he ran out of patience at the 13th in his third round, chasing a putt which rolled past the cup and hitting the ball backward towards the hole before it had stopped as it continued down the slope.
The five-time major champion was given a two-shot penalty and signed for an 11-over 81 on his 48th birthday amid calls for him to be disqualified.
Conditions at the Long Island course were described as unplayable, with dubious pin positions on moving day and Cowen - who works with back-to-back U.S. Open champion Brooks Koepka - said Mickelson was making a point to the United States Golf Association.
The Englishman told Omnisport: "He was making a statement that, 'This is ridiculous and I'm going to show you how ridiculous this is'.
"I think you've got to because it was outrageous what they did to the course.
"You might as well have played two different courses and said, 'We'll play this easy course in the morning and play this really difficult course in the afternoon'.
"Is that fair? Not really. They should have known that the weather was going to deteriorate, get hot and sticky with the wind blowing quick and they got the greens too quick and put the pins in the wrong place.
"It was human error and Phil Mickelson was saying, 'Don't make us look stupid, this is how stupid it is'.
"Ethically it [Mickelson's conduct] was incorrect, it shouldn't have been done and is not a good example to kids, but I can see why he did it.
"That pin at 13 was a joke. There are legal limits to how much slope you can put a hole on and I would say that was beyond the legal limit."
|UEFA should punish PSG and Man City, says LaLiga chief|
|Teenage driver Floersch has ´no fear of paralysis´ after operation|
|Mancini bemoans Italy´s misfortune in front of goal|
|Sprint legend Johnson ´pretty much back to normal´ after stroke|
|Bournemouth defender Adam Smith out for three months|
|World champions France out to end 2018 on a high|
|I told him there´s no future in football! A-Rod relieved to be ignored by Mahomes|
|Dembele must focus and be more responsible - Suarez|
|Neymar could return one day – Barca chief|
|Cole backs West Ham to keep Arnautovic|
|Injury rules Bernardo Silva out of Poland clash|
|Lamar Jackson debut start ´spectacular´ - Ravens coach Harbaugh|
|Babar run out the turning point, laments Sarfraz|
|West Ham boost London Stadium capacity to 60,000|
|A great advertisement for Test cricket - Williamson revels in stunning win|
|Van Dijk one of the world´s best - Klaassen|
|Floersch had ´angel on her shoulder´ in horror crash|
|Gascoigne charged with sexual assault|
|I am going to stay at Chelsea and fight, insists Giroud|
|Hansen to make announcement on All Blacks future|
|I have reached the top by joining Chelsea - Sarri|
|Bonucci tells Italy boo boys to ´live with less envy´|
|Dramatic Pakistan collapse gives Stead first New Zealand Test win|
|Button enjoying racing for first time in years|
|Dortmund chief not planning Pulisic sale|
|Theismann: Smith leg break ´heart-wrenching´ to watch|
|Wolves defender Jonny suffers knee injury|
|Holmes to meet with Sharks amid NFL switch talk|
|LeBron made 51 points ´look easy´, says Walton|
|McGuire signs four-year deal with Cowboys|
|Bears beat Vikings to extend NFC North lead|
|Peng overcomes Davis in Houston final|
|Kerr says this has been his toughest stretch as Warriors coach|
|LeBron scores 51 in Lakers´ win, Warriors fall to Spurs|
|Win more than Djokovic? Let´s chill out – Zverev|
|Steelers´ rally highlights wild day of close, last-minute finishes|
|Modric not worried about Ballon d´Or|
|Saints pull away for blowout victory over Eagles, extend winning streak to nine|
|Martinez laments loss of control by Belgium|
|Logano claims first NASCAR Cup championship|
|Luis Enrique delighted with attitude of Spain´s squad|
|Stevens tells Celtics to get ´tougher´|
|Griezmann: Being Messi´s lieutenant played a part in rejecting Barcelona|
|Curry proud of how Warriors handled Green-Durant incident|
|Courtois: Belgium thought Nations League job was done|
|Howell ends 11-year title drought to deny record-breaking Rodgers|
|Robben dismisses Bayern title talk|
|Huge blow for Redskins as QB Smith breaks tibia and fibula|
|Switzerland 5 Belgium 2: Seferovic treble crowns incredible comeback|
|Titans DC Pees taken to hospital during Colts game|
|Spain 1 Bosnia-Herzegovina 0: Debutant Mendez spares Morata´s blushes|
|Peterson goes sixth on rushing touchdowns list|
|Titans QB Mariota suffers elbow injury|
|Djokovic hails much-improved Zverev|
|Arnautovic refuses to discuss West Ham future after Austria win|
|Redskins QB Smith carted off after gruesome ankle injury|
|Jaguars shut down Jalen Ramsey trade rumours|
|Classy Zverev revels in victory, hails defeated Djokovic|
|Forget the Nations League was ever invented, jokes Northern Ireland boss O´Neill|
|Magnificent Zverev claims ATP Finals title|
|Mahrez double fires Algeria to 2019 AFCON|
|Mbappe hoping for French winner of Ballon d´Or|
|Northern Ireland 1 Austria 2: Last-gasp winner denies hosts maiden Nations League point|
|Teenager admits assaulting Wales great Thomas|
|Browns deny Condoleezza Rice is candidate for head coaching job|
|Koeman: Netherlands not favourites for Germany clash|
|Dalic ´not sad´ but blames fatigue for Croatia relegation|
|Proud Southgate hails England hero Kane as world´s best goalscorer|
|Last-gasp Exeter penalty try shatters Bristol|
|Mbappe dismisses talk of Cavani-Neymar rift|