Matt Cain threw a 20-pitch bullpen session for the San Francisco Giants on Wednesday.
The light throwing session was the first time Cain has thrown off a mound since straining his flexor tendon April 4.
Giants manager Bruce Bochy said it is the first of "three or four" bullpen sessions he will throw.
Also Wednesday, outfielder Hunter Pence continued his rehab assignment. Pence has two hits in four games as he comes back from a fractured left forearm.
Bochy said he is looking to get the outfielder more at-bats and will be evaluating him on a daily basis.
Information from The Associated Press was used in this report.