UPDATE (8:00am on Thursday) -- The Giants placed Hunter Pence on the disabled list and recalled Mac Williamson from Triple-A Sacramento.
UPDATE (8:05 pm PT): Hunter Pence is heading to the disabled list, manager Bruce Bochy told reporters after the game.
It was just in the last day or two that Hunter Pence started to look like his old self on the bases, but that didn't last long. Pence busted it out of the box in the top of the fourth inning Wednesday in Atlanta and almost immediately grabbed at the bottom of his right hamstring, the same spot where he had a strain that cost him six games last month.
Pence made it just halfway down the line and was immediately surrounded by trainers and coaches. He was removed from the game and went back to the clubhouse, with Jarrett Parker entering in right field.
Pence is off to a good start this year, hitting .298 with seven homers and 36 RBI. His .861 OPS ranks 13th among National League outfielders.
The Giants learned last year how difficult life can be without their power-hitting outfielder and most energetic player. Pence missed 110 games because of wrist and oblique injuries.
They already are playing without Angel Pagan, who has a left hamstring strain. Pence and Pagan were out of the lineup at the same time at one point, but both strains were ruled moderate after MRIs, and both outfielders returned to the field. Pagan couldn't shake the injury, though, and was put on the DL on May 24. He is not eligible to return until June 8.