"It's pretty minor. It's just a little discomfort," Greinke said. "It wasn't so bad once the game got on, but getting loose was tougher."
"He came into my office the day after the start or the next day and he told me what he was feeling," manager Don Mattingly said. "We were just hoping it would resolve over the week, and for the most part it doesn't feel really serious, but at this point we don't want to take any chances with him."
Greinke had a similar injury in Spring Training last year, which caused him to miss two weeks, although Greinke said this injury is less severe.
Though the Dodgers had shortstop Jimmy Rollins in the starting lineup for the first time since Sept. 6, Carl Crawford was out of the lineup with left shoulder bursitis.
Crawford has been dealing with back and hamstring ailments, but it was the shoulder that prevented him from being in the starting lineup. Mattingly said he hopes Crawford will be able to at least pinch hit Wednesday.
Steve Bourbon is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.