Hairston later explained he reacted to an unnamed Padres player Hairston felt was chiding the injured Greinke.
Despite losing Hairston for Wednesday night's game, the Dodgers weren't short-handed in position players, because they also recalled catcher Tim Federowicz and placed pitcher Chris Capuano on the disabled list.
The moves left the Dodgers thin in the bullpen for Wednesday night, with relievers having pitched nine of the last 12 innings against the Padres. Manager Don Mattingly said the club was willing to take that chance with ace Clayton Kershaw starting the game.
"We got the right guy on the mound," Mattingly said. "You don't ever know what's going to happen. Because of logistics of off and ons and things like that, we're rolling the dice a little bit today. Counting on Kersh. We still got four guys."
Ken Gurnick is a reporter and Austin Laymance is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.