"I'm all right," Ethier said. "I'll see how it feels tomorrow. It was just getting more sore and was still bruised."
Mattingly said Ethier was not available to pinch-hit Tuesday.
Ethier has been the club's most durable outfielder this season, playing 114 games. He is third on the team with 41 RBIs.
Skip Schumaker started in center field and went 0-for-3 in place of Ethier.
Austin Laymance is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.