Posada started at catcher and batted sixth Sunday in the finale of a three-game series against the Chicago White Sox. He hadn't played since leaving Wednesday night's game against Texas after getting hit by a foul ball that bruised his left ring finger. X-rays were negative.
"I just pray that he doesn't get a foul tip off his finger today," manager Joe Girardi said. "That's my biggest concern. Physically, the rest of his body is pretty good -- except that finger."
The Yankees were still unsure whether right-hander Sergio Mitre would be able to make his next scheduled start. Mitre left Saturday's 10-0 win in the seventh inning after he was struck in the right forearm by a line drive.
"He's got a nice mark," Girardi said. "I don't think we're really going to know until tomorrow, after he goes through all the treatment and he tries to play catch, and if he can do his bullpen."
The team's No. 5 starter, Mitre is 3-1 with a 5.65 ERA in eight games for the Yankees, including seven starts. Right-hander Chad Gaudin would be a likely candidate to pitch in place of Mitre if he can't take his next turn in the rotation.