The San Francisco Giants placed catcher Eli day disabled list Friday due to a concussion.

It is not clear when the 31-year-old suffered the setback, but his faceplant into second base during this past week's series in Atlanta is a likely culprit.

Whiteside, thrust into the starting role after Buster Posey's season-ending leg injury, hit .221 with four homers and 16 RBI in 66 games this season.

To fill the roster spot, the Giants recalled catcher Hector Sanchez from Triple-A Fresno prior to the start of a three-game set against the Astros.