Lilly missed his scheduled start Tuesday, and manager Don Mattingly said the lefty continued to receive treatment, which included acupuncture.
"We've still got a day or so to make a decision," said Mattingly, who likely would move up fifth starter Chris Capuano and skip Lilly in the first series, since the Dodgers are off the fifth day of the season.
Reliever Matt Guerrier came out of a Minor League game without incident Tuesday and will appear in another one Wednesday. He could return to Spring Training game action Friday. Mattingly said the team is "counting on him being ready Opening Day" after he missed two weeks with a bad lower back.
Adam Kennedy was improved enough from a strained right groin to resume hitting Tuesday, but not running.
Starting third baseman Juan Uribe was a late scratch from the starting lineup Tuesday. Manager Don Mattingly said Uribe apparently was struck in the groin with a ball he bunted.
"I didn't see it happen, but I came over and he was lying down," said Mattingly, who expects Uribe back in action Wednesday.