Mark McGwire Autographed AL MLB Baseball COA +
Updated July 23, 2026
| Lot number | 127 |
| Estimate | $100 - $10,000 |
| Opening bid | $50 |
| Auction | Sports Cards & Memorabilia Auction - ONLINE ONLY |
| Date | August 7, 2026 at 9:00 AM CDT |
| Auction house | Donley Auctions |
| Location | Union, Illinois |
Oakland Athletic & St Louis Cardinal fan favorite Mark "Big Mac" McGwire autographed Official American League MLB ...
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