MLB Collectibles > San Francisco Giants > Baseballs Willie Mays 1954 San Francisco Giants World Series Champs Team Signed Baseball BAS - Autographed Baseballs Vintage 1956 San Francisco Giants Autographed by 25 Willie Mays Rawlings ONL Baseball - Autographed Baseballs Madison Bumgarner signed 2014 World Series baseball PSA/DNA San Francisco Giants - Autographed Baseballs Mike Yazstremski Autographed San Francisco Giants OML Baseball Insc FAN 46891 - Autographed Baseballs Willy Adames San Francisco Giants Autographed Baseball - Autographed Baseballs 1988 San Francisco Giants Team Signed Baseball Beckett Certified - Autographed Baseballs More San Francisco Giants Autographed Baseballs