Henry Blanco could be out for season
An MRI performed Tuesday in Phoenix revealed the tear. Blanco was injured Sunday in a game at Philadelphia when the Phillies' John Mayberry slid into his mitt at home plate.
Diamondbacks manager Kirk Gibson said before Tuesday night's game at Pittsburgh that he did not have a timetable for Blanco's return but conceded he might not return this season.
Blanco, who was placed on the disabled list Monday, is hitting .188 with one home run in 21 games this season.
Copyright 2012 by The Associated Press