SF Giants Willie McCovey Game Worn Used Baseball Jersey MEARS 10. HOFer and 500 Home run hitter Willie McCovey wore this jersey in the 1979 season! Jersey shows great use (as well as some pine tar staining on the shoulder), is completely unaltered, and comes with a full MEARS A10 letter of authenticity!! A truly spectacular gem from one of San Francisco’s finest! Please wait for the invoice…. The free listing tool. The item “SF Giants Willie McCovey Game Worn Used Baseball Jersey MEARS 10″ is in sale since Wednesday, August 9, 2017. This item is in the category “Sports Mem, Cards & Fan Shop\Game Used Memorabilia\Baseball-MLB\Jerseys”. The seller is “probstein123″ and is located in Passaic, New Jersey. This item can be shipped to United States.