During a timeout late in Sunday's game, Kerr was caught on television talking to his assistants and appeared have harsh words regarding forward Draymond Green.
"I'm so f--king tired of Draymond’s s--t," the coach seemed to say, as Anthony Slater of The Athletic noted.
Per Slater, Kerr was made aware that the clip had gone viral on the internet and tried to speak to Green after the game, but the player had already left the locker room before he got there.
Kerr addressed the situation Monday, joking about what he had really said on camera:
He also noted that any discussion about it with Green was "private."
Golden State still has the best record in the Western Conference entering Monday at 45-21, but the team is 4-6 in its last 10 games.
Green has been a major question mark this season offensively, averaging just 7.0 points per game on 43.3 percent shooting. Against the Suns, the forward finished with six points on 3-of-9 shooting, including 0-of-3 from three-point range.
Meanwhile, the team also dealt with chemistry issues this season earlier in the season.
Between those issues and the inefficiency on the court, it's possible Kerr simply let his frustrations boil over.
Regardless of what was said in public or private, the two sides will hopefully figure out a way to make peace as they try to help the Warriors win their third straight NBA title. Green will become an unrestricted free agent after the 2019-20 season.