The A's announced that they designated right-hander Trystan Magnuson for assignment. In corresponding moves, the A's reinstated left-handers Brett Anderson and Dallas Braden, right-handers Joey Devine and Evan Scribner and infielder Daric Barton from the 60-day DL.
Magnuson made his MLB debut in 2011, posting a 6.14 ERA with 6.8 K/9 and 3.1 BB/9 in 14 2/3 innings with Oakland. The 26-year-old also posted a 2.98 ERA with 9.1 K/9 and 3.8 BB/9 in 45 1/3 innings at Triple-A. He didn't pitch in a game after the A's placed him on the 15-day DL with right shoulder tendinitis in mid-August.