Hendriks, who has been on the DL with a triceps strain since May 8, made four Minor League rehab appearances, his most recent a two-inning outing with Triple-A Nashville on Thursday. He allowed one run on two hits and one walk with one strikeout.
"I felt really good," Hendriks said. "Ball's coming out good."
Hendriks made 11 appearances before going down with the injury, pitching to an 8.27 ERA with 15 earned runs allowed across 16 1/3 innings.
• The A's optioned utility man Tyler Ladendorf to Triple-A Nashville to make room for Saturday's starter Andrew Triggs. Ladendorf had just two hits in 23 at-bats in his second stint with the A's.
• San Jose Sharks players Logan Couture, Martin Jones, Brenden Dillon, Barclay Goodrow and Justin Braun visited with A's players prior to Saturday's game. Jones, Dillon and Braun threw out the ceremonial first pitches.
Jane Lee has covered the A's for MLB.com since 2010.