Giants' Posey struck in head by pitch, leaves game

SAN FRANCISCO (AP) Buster Posey has left the San Francisco Giants' home opener after being hit in the helmet by a 94 mph fastball from Arizona starter Taijuan Walker.

Posey was struck by an 0-1 pitch with two out in the first inning Monday and immediately went down. Athletic trainer Dave Groeschner sprinted toward the plate and manager Bruce Bochy was right behind. Posey got up on his own but exited the game, with Nick Hundley entering to pinch run and stay in the game as catcher.

Walker was booed at the conclusion of the inning.

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