Giants ace Madison Bumgarner throws bullpen session

SAN FRANCISCO -- San Francisco Giants ace Madison Bumgarner threw off a mound Monday for the first time since surgery in March to have three pins inserted into the broken pinkie on his pitching hand.

Bumgarner threw 20 fastballs to take another step in his comeback from the injury that sidelined him since being hit in the hand by a line drive at the end of spring training.

He said he's been throwing breaking pitches on flat ground but because the session was so short Monday he stuck to fastballs and was encouraged by how he felt.

"I could also tell the last few days last week throwing on flat ground what it was going to feel like," he said. "It wasn't like I was surprised I felt good because…