The optioned top pitching prospect to AAA.
Bumgarner was shaky this Spring with 7 walks and no strikeouts in 7 innings.
After spending the 2009 season split between A+ and AA, Bumgarner got a taste of the big leagues. He appeared in 4 games, posting a 1.80 ERA in 10 innings.
The Giants will keep a close eye on Bumgarner in AAA to start the season as the bottom of their rotation isn't solid. He could get a call-up as early as June.