Buster Posey went 2-for-6 with a three-run home run in Thursday's 12-6 win over the A's.
Madison Bumgarner posted a rare misstep of a start in Thursday's 12-6 win over the A's, allowing four runs on seven hits over 6 1/3 innings.
Ramiro Pena's MRI revealed a sprained ankle.
Giants designated RHP Jacob Smith for assignment.
Giants optioned RHP Chris Stratton to Triple-A Sacramento.
Giants purchased the contract of INF Grant Green from Triple-A Sacramento.
The Giants will forgo the DH and have Madison Bumgarner bat in his start in Oakland on Thursday.
Jake Peavy was tagged for seven runs -- four earned -- in 3 1/3 innings by the A's on Wednesday.
Kelby Tomlinson (thumb) will begin a rehab assignment with Advanced-A San Jose this weekend.
Sergio Romo (elbow) will pitch in back-to-back games with Triple-A Sacramento on Thursday and Friday.
Giants recalled RHP Chris Heston from Triple-A Sacramento; placed him on the 60-day disabled list with an oblique strain.
Giants purchased the contract INF Ruben Tejada from Triple-A Sacramento.
Giants placed 2B Joe Panik on the 7-day concussion disabled list.
Brandon Crawford went 3-for-5 with five RBI in Tuesday's 13-11 loss to the A's.
Albert Suarez surrendered three runs on three hits over 5 2/3 innings in Tuesday's no-decision against the A's.