CHICAGO -- The Giants hope that Mac Williamson can perform as if those 27 games he missed were a mere nuisance.
The Giants activated Williamson from the disabled list Friday and immediately installed him in left field for 6-2 loss in the series opener against the Cubs at Wrigley Field. Williamson hadn't played for the Giants since April 24, when he sustained a concussion in a collision with the left-field wall.
This wasn't a mere one-day, knock-the-rust-off start for Williamson. Giants manager Bruce Bochy said that Williamson, who hit a robust .316 (6-for-19) with three homers and six RBIs in five games before being sidelined, will receive "the lion's share" of playing time in left.
Williamson hurt himself when he stumbled and collided with the left-field wall adjacent to the Giants' bullpen at AT&T Park in pursuit of a foul ball.
"I'm excited to be back," Williamson said. "My body feels good. It's encouraging."

Williamson contributed immediately by throwing out Albert Almora Jr. at home plate in the first inning. Statcast™ stracked Williamson's throw at 94.6 mph. He finished the game 0-for-4 with three strikeouts, including going down swinging on three pitches to end the game with two runners on.
The Giants optioned left-hander Josh Osich to Triple-A Sacramento to clear roster room for Williamson. This trimmed San Francisco's pitching staff to 12 -- one fewer than usual, which is not an ideal situation with a three-game series at Coors Field looming ahead beginning Monday. Expect the Giants to add a reliever by that date.