San Francisco Giants first baseman/outfielder Michael Morse could miss at least two weeks after injuring his left hamstring running during Monday's game against the Chicago White Sox, manager Bruce Bochy said.

"It's too bad for him. He was playing some really good ball, swinging the bat well, doing all the things he needed to do to make this club," Bochy said. "He just said he reached for the bag and felt it, so it's going to take a little while."

The veteran, who turned 35 on Wednesday and won a World Series with the Giants in 2014, seemed upbeat despite the injury. He said he is day-to-day after a scan revealed nothing torn.

"I feel better already," Morse said. "I either thought I was going to do really bad or really good [in spring], and I thought I played pretty good. ... I don't think this is something that will stop me from playing."

Michael Morse could miss two weeks with a hamstring injury, but he insists he is day-to-day. Thearon W. Henderson/Getty Images

Morse, who returned to the Giants on a minor league deal after taking almost all of last season off, was in strong contention to win a reserve spot on the big league roster, but that could now be in jeopardy.

He has said he would consider retirement if he didn't make the club out of spring training, but Bochy hopes Morse chooses to get well and come back.

"He came to camp in tremendous shape, and that should show him that he still has some baseball left, good baseball," Bochy said. "So my hope is he'll sit down and think about it and get back from rehabbing it."

The Associated Press contributed to this report.