SAN FRANCISCO -- Andres Torres was greeted with a standing ovation in his return to his former home. But Torres ultimately was forced to leave the game in the eighth with an injury to the base of his right thumb, three innings after getting tangled with Madison Bumgarner on a play at first base.

Terry Collins believed Torres had the thumb stepped on by Bumgarner. Torres had X-rays postgame, but said he was unaware of the result. The thumb remained uncomfortable.

The switch-hitting Torres could not bat from the left side, so he had to depart once the southpaw Bumgarner was pulled and he was due to face a right-handed reliever.

"It was really numb. And then it was still sore," Torres said. "And I tried to hit left-handed, but I couldn't. I got X-rays. I have to wait and see. I hope it's not that bad."

Angel Pagan, for whom Torres was traded, suffered a hand injury, too -- but it apparently was self-inflicted.

Giants manager Bruce Bochy told San Francisco media that Pagan suffered a bruised hand striking an object in anger.