One entire side of the Giants infield is now on the concussion disabled list.
Second baseman Joe Panik was placed on the 7-day DL Tuesday, joining first baseman Brandon Belt.
Panik took a hard tag to the face during the second game of Sunday's doubleheader against the Nationals.
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The move is retoractive to August 14.
Infielder Orlando Calixte was recalled to take Panik's spot on the roster.
This is the second time in two years that Panik has landed on the disabled list with a concussion. Last July, then-Rays pitcher Matt Moore plunked Panik in the head with a pitch. It took 10 days before the Giants would place their second baseman on the DL. This time, it took just two days.