Golden State guard Jarrett Jack said the league warned him about flopping in a preseason game. “So I’ve been warned for flopping hahaha,” Jack tweeted.

A league source told Grantland.com that NBA officials warned “about 10” players for flopping, but the league refused to release the names.

“Flops have no place in our game — they either fool referees into calling undeserved fouls or fool fans into thinking the referees missed a foul call,” NBA vice president of basketball operations Stu Jackson said in a statement. “Accordingly, both the Board of Governors and the competition committee felt strongly that any player who the league determines, following video review, to have committed a flop should — after a warning — be given an automatic penalty.”

Any player guilty of flopping will be subject to a warning, followed by a $5,000 fine for a second violation, $10,000 for the third and $15,000 for the fourth. The fifth flop will result in a $30,000 fine. Six or more violations will lead to an increased fine and/or suspension.

– Reported by John Rohde of the Oklahoman