After Philadelphia Phillies star Bryce Harper got in the face of Major League Baseball commissioner Rob Manfred during a heated meeting last week, Mark DeRosa, a former big leaguer who now works for Manfred, said something some players took as a threat, according to four people who attended the meeting or were briefed on it.

Bryce Harper told Rob Manfred to "get the f*** out of our clubhouse" if he wanted to talk about a salary cap, ESPN reported.

Bryce Harper confronted Rob Manfred last week over the issue of a salary cap in baseball, a major league source confirmed Monday. Harper spoke out near the beginning of the Phillies’ meeting with Manfred before a July 21 game at Citizens Bank Park,