Just when the Yankees thought things were looking up, the injury bug bites again. This time, the victim is backup catcher Francisco Cervelli.

The player affectionately known as "Cisco The Kid" is out indefinitely with concussion symptoms. Cervelli was examined Monday in New York by Dr. Kirk Roberts, a neurologist specializing in concussion syndromes. The Yankees said before last night's game in Seattle that the catcher was diagnosed with a concussion, but MRI results were negative.

Cervelli is resting at home and there is no immediate timetable for his return. All of his baseball-related activities have been suspended. Cervelli is batting .266 with four homers and 22 RBIs.

With starting catcher Russell Martin still sidelined by a sore right thumb, the Yankees are now forced to hand the catching duties to a pair of rookies: Jesus Montero and Austin Romine.