SAN FRANCISCO -- An MRI on Santiago Casilla's right knee following Friday's 4-3 win against Chicago showed the closer has a bruised tibia, manager Bruce Bochy said before Saturday's game.

"He's most likely not going to pitch today, but hopefully he'll pitch tomorrow, so that's pretty good news for us," Bochy said.

Casilla injured his leg in the ninth inning of Friday's game while fielding Darwin Barney's infield single. Casilla left the game after having given up a three-run home run to narrow the Giants' lead to one, and Javier Lopez came in to record the two final outs after inheriting two runners from Casilla.

Bochy said Casilla would receive treatment on his knee Saturday and that the closer remains day to day.

Sandoval set to kick off Minors rehab stint

SAN FRANCISCO -- Pablo Sandoval was scheduled to begin his rehab assignment Saturday as the designated hitter for the San Jose Giants (Class A-Advanced) against the Stockton Ports.

"It's good news that we're getting him back out there on the field and swinging the bat," Giants manager Bruce Bochy said. "Hopefully we'll get him ready soon."

Bochy had said previously that he expects Sandoval's rehab assignment to last four to five games, and he said Saturday that Friday looks like a possible return date for the third baseman barring any setbacks.

Sandoval fractured a bone in his left wrist on May 2 and will only be batting left-handed initially as he continues to recover from the injury.

Giants, Cubs commemorate 1912

SAN FRANCISCO -- The Giants and Cubs went retro for Saturday's matchup, turning the clock back to 1912.

In the "Turn Back the Century Game," both teams wore replica uniforms from 1912, with the Giants even being referred to as the "New York Giants."

Additionally, AT&T Park featured a vintage scoreboard without videos, and there were roving barbershop quartets outside the gates of the park.

Ushers, security guards, groundskeepers and other stadium staff wore 1912-era clothing, and only organ music was played during the game. The starting lineups and pregame announcements were made using a megaphone from the field instead of the usual PA system.