Yankees catcher Jorge Posada underwent examinations on Wednesday by a neurology specialist at New York-Presbyterian Hospital after complaining of concussion-like symptoms.
The tests came back negative and Posada is day-to-day.
New York manager Joe Girardi said Wednesday that Posada felt "foggy" after being hit by a foul tip on Tuesday.
"I saw him today and asked him how he felt," Girardi said. "He said he didn't sleep a whole lot last night and he had somewhat of a headache, but I heard him laughing in the [players'] lounge. That made me feel better. Jorgie has one of those laughs that carries."
Posada Dealing With 'Foggy' Head