SAN FRANCISCO (KRON) — The San Francisco Giants have placed catcher Buster Posey on the seven-day concussion disabled list after he was hit in the head by a fastball during Opening Day on Tuesday afternoon, according to the team.

The Giants have added catcher Tim Federowicz to the 25-man roster. Backup catcher Nick Hundley is expected to get most of the action while Posey is on the disabled list.

To make room for Federowicz on the 40-man roster, pitcher Clayton Blackburn has been designated for assignment.

Posey told reporters Tuesday that he’ll be ready to go in a week, once he’s eligible to come off the DL.

On Monday, Posey was doing well after being struck by a 94 mph fastball in the first inning Monday, a scary moment in San Francisco’s 4-1 victory over the Arizona Diamondbacks during its home opener.