Alonso was lifted in the seventh inning of Wednesday's game against the Mariners with left knee soreness, Susan Slusser of the San Francisco Chronicle reports.

Alonso was 0-for-2 before Rajai Davis was subbed in for him, shifting Mark Canha from center field to first base. It's unclear how serious the injury is at this point, but more should be known after he's checked out further Thursday.

More News
CBS Sports Shop
MLB Opening Day
Our Latest Stories