Description:Bill Mazeroski professional model Pittsburgh Pirates undershirt c.1960s. Rawlings flannel button up undershirt as worn by Bill Mazeroski retaining its Rawlings tagging inside the collar. Light to moderate use is visible with vintage "9" written in black marker on the back of the collar area. The shirt is currently not autographed by Bill Mazeroski but will be included if the winning bidder desires as much. Includes LOA from Hunt Auctions: EX