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The San Francisco Giants placed star catcher Buster Posey on the seven-day disabled list and have called up Tim Federowicz to take his place on the 25-man roster.
Posey was struck in the head by a pitch in the first inning of Monday's game against the Arizona Diamondbacks and left that game, according to the Associated Press (via ESPN.com).
"It's a scary moment, dangerous moment," manager Bruce Bochy said of the incident. "It's one of the worst sounds you can hear in baseball, the ball hitting the helmet.