Drew Pomeranz is expected to undergo arthroscopic surgery on his left AC joint.
Doctors have recommended that Drew Pomeranz undergo a clavicle resection.
Drew Pomeranz has been shut down for the season with an AC joint issue in his left shoulder.
Drew Pomeranz picked up his third save of the season Saturday in the A's defeat of the Diamondbacks.
Drew Pomeranz earned his second save of the season Wednesday in the A's defeat of the Dodgers.
Drew Pomeranz will start for the A's on Thursday afternoon against the Blue Jays.
Drew Pomeranz notched the first save of his career Tuesday, tossing 1 2/3 scoreless innings in a win over the Rangers.
Athletics activated LHP Drew Pomeranz from the 15-day disabled list.
Athletics manager Bob Melvin confirmed that Drew Pomeranz (shoulder) will be sent to the bullpen when activated from the disabled list on Wednesday.
Drew Pomeranz (shoulder) is likely to be activated from the disabled list Wednesday.
Drew Pomeranz (shoulder) is scheduled to make his first minor league rehab start with High-A Stockton on Sunday.
Drew Pomeranz (shoulder) will throw a bullpen session on Thursday.
Drew Pomeranz (shoulder) will play catch on Monday.
Drew Pomeranz received a cortisone shot for his sprained left AC joint.