X-rays were negative, and Mora is day-to-day with a laceration of his right ring finger.
The two-time All-Star was involved in a tight defensive play at third base in the third inning, and Yankees designated hitter Hideki Matsui slid feetfirst and caught Mora on the hand. The veteran was tended to on the field, but wasn't able to continue.
The Yankees were already leading by four runs when the play occurred, and Mora was trying to keep Matsui from advancing further into scoring position. Right fielder Nick Markakis had thrown a perfect one-hop strike that arrived feet ahead of Matsui, but the ball got past Mora and left him prone. Matsui, who slid safely, hit Mora's hand right before the base.
Baltimore head athletic trainer Richie Bancells tried to close the wound on the field, but manager Dave Trembley decided to give Mora the rest of the night off. Alex Cintron replaced him and immediately made a tough play on a grounder to third. Both Matsui and the player whose hit spurred the injury -- Robinson Cano -- wound up scoring before the inning was done.
Mora said he hopes to play Thursday and said that he couldn't have played any further into the game.
"I had a lot of pain and a bruise on my finger," he said. "It was a little tender. I couldn't hold the ball."
"He says he wants to play [Thursday] and he thinks he's going to be OK," Trembley said. "We're going to have to re-evaluate that when he comes in [Thursday]. The thing is the X-ray was negative. He got spiked in a couple of different places on his hand. We'll see how he is [Thursday]. If he's able to play, he'll play. If he's not, we'll make an adjustment."
Spencer Fordin is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.