Mark McGwire Autographed 1989 World Series Signed Baseball Beckett COA with UV Display Case is a must-have collectible for baseball fans and memorabilia enthusiasts. This official 1989 World Series baseball features McGwire’s authenticated signature verified by Beckett COA commemorating his role in the Oakland Athletics' championship victory. The included UV display case ensures long-term preservation and an elegant presentation. A perfect addition to any premium collection this rare piece is ideal for display. Add this exceptional item to your lineup today.