Charlie Finley's A's were a crazy bunch Catfish, Blue Moon and Rollie were as swingin' off the field as they were on it. This jersey is enhanced with the 100th Anniversary of Baseball patch on the lower left chest Jersey Number This authentic jersey will have the number 27 on it. This is the number worn by Jim Hunter with the 1969 Oakland Athletics. Please note: the player's name is not on the jersey. Quality Construction Authentic Materials. Accurate detailing. Exceptional workmanship. These are the hallmarks of Mitchell & Ness's shirts, jackets, sweaters and felt pennants. The wool flannel shirts are constructed of a lightweight wool blend predominant in the late 60's. The 70's and 80's knit jerseys are made of fabrics identical to the originals.