SEATTLE - Drew Pomeranz, shut down for the final week of the season with an AC joint, met with A’s orthopedist Dr. Will Workman this week and after an MRI, Workman advised arthroscopic shoulder surgery The procedure, a clavicle resection, is not considered major shoulder surgery. Melvin said that right-hander A.J. Griffin, shut down with shoulder tendinitis this summer after recovering from Tommy John surgery, should be good to go for spring training.