Sold at Auction: Pete Alonso autographed New York Mets jersey (MLB Authentication).

Pete Alonso Signed, Inscribed New York Mets Home Jersey (#44/44) - MLB Authenticated, Fanatics on Goldin Auctions

Pete Alonso #20 - Autographed Game Used First Responder Hat and Game Used White Commemorative Jersey with American Flag Patch - Mets vs. Yankees - 9/11/2021

Pete Alonso #20 - Autographed Game Used Baseball - Pete Alonso Sets Citi Field Home Run Record - Inscribed Citi Field Home Run Record - Yusei Kikuchi to Pete Alonso - Foul

Pete Alonso New York Mets Autographed 2019 Topps Chrome Update #52 Beckett Fanatics Witnessed Authenticated Rookie Card

Framed Pete Alonso New York Mets Autographed Blue Nike Authentic Jersey - Autographed MLB Jerseys at 's Sports Collectibles Store

Pete Alonso Signed New York Mets Jersey (Fanatics Hologram)

Pete Alonso Signed New York Mets Jersey (Fanatics Hologram)

Pete Alonso #21 - Game Used White Pinstripe Jersey - Roberto Clemente Day - Mets vs. Pirates - 9/15/22 - 2-3, BB, RBI, 1 R; Mets Win 7-1

Pete Alonso Mets Signed Official 21 HR Derby Champ Jersey Auto MLB Fanatics /44

Pete Alonso New York Mets Autographed 2018 Topps Chrome Update MLB #52 Beckett Fanatics Witnessed Authenticated 9/10 Rookie Card

How MLB Authenticates Balls Like Aaron Judge's 60th Homer - The New York Times

Tom Seaver New York Mets Autographed White Cooperstown Collection Jersey with Multiple Inscriptions