Beautiful, bold Mariano Rivera signature in blue pen across the sweet spot of an official league baseball. The greatest closer of all time and the first player ever elected unanimously to the Baseball Hall of Fame (2019). 652 career saves, 5x World Series champion, 13x All-Star.

The signature is clean, well-centered, and strong — exactly what you want from a Rivera single-signed ball. Ball itself is bright white with no toning or spotting.

Authentication: Verified as authentic by autograph expert Steve Grad of GRAD Authentication (Letter of Verification #GA-05739, dated July 8, 2026). Steve Grad is the former Lead Authenticator for PSA/DNA and Beckett Authentication, and has served as the autograph expert on History Channel’s Pawn Stars since 2013. The Letter of Verification, which is based on Grad’s professional digital review of this exact ball, is included with the sale and matches the item pictured.

Enter Sandman. Add the greatest ninth-inning weapon in baseball history to your collection.