Oscar De La Hoya once described Donald Trump as a “nice guy I’ve played golf with.” More recently, the boxing champion-turned promoter has told people not to vote for the presidential candidate and even wondered aloud if Trump is “trying to get Hillary Clinton elected.”

But with the real estate mogul having all but locked up the Republican nomination, De La Hoya brought out the heavy artillery, providing details of their golf outing that are damning, indeed, if you subscribe to the sport’s heavy emphasis on personal integrity.

That’s right, Trump cheats at golf.

At least that’s how De La Hoya told it Wednesday in Las Vegas, where he is promoting Saturday’s middleweight title fight between Canelo Alvarez and Amir Khan. (It’s not a complete coincidence, by the way, that the event showcases a Mexican and a Muslim, but let’s get back to the cheating-at-golf thing.)

De La Hoya said he and some partners were teeing off at Trump National Golf Club in Los Angeles two years ago when “The Donald” himself pulled up in a cart and asked to join. “Of course, this is your golf course,” De La Hoya said he told him (via the Associated Press).

The “Golden Boy” said that Trump proceeded to hit a drive that went into the water. He hit another drive, which went out of bounds. A third hit the drink again, and a fourth — apparently Trump is hardly conservative when it comes to mulligans — veered off into some bushes.

However, instead of seeing their unexpected partner head off in search of his ball amid the bushes, “what do we see but Donald Trump right in the middle of the fairway,” De La Hoya said. “He said, ‘Hey look, I found my first ball.’ ”

“We’re like, ‘Okay, yeah.’ We’re cracking up, not in front of his face,” De La Hoya recalled (via Yahoo Sports).

The fun continued a few holes later, at a 170-yard par 3. De La Hoya said that Trump again hit a ball into some bushes, then drove ahead in his cart while the rest of the group prepared to take their shots.

“We get up there [to the green] and he’s like, ‘Oh, my ball’s right here!’ Three feet away [from the hole].” De la Hoya said. Then he quoted Trump as saying, “And by the way, I’m going to pick it up — it’s a gimme.”

De La Hoya is leaving a pair of tickets to the Alvarez-Khan fight for Trump, who is a known boxing fan. However, he didn’t sound eager to hit the links again with businessman, saying, “It shows something about his character.”

“Golf is a gentleman’s sport,” De La Hoya said. “You don’t lie about your score, you don’t lie about moving your ball. It goes to show what we’re dealing with.”