The signature has been authenticated by JSA Witnessed. You can it check out on JSA's website.
Gerry Cheevers Boston Bruins Autographed Signed Black Style Jersey XL coa=JSA
Patrice Bergeron Autographed Memorabilia Signed Photo, Jersey, Collectibles & Merchandise
Patrice Bergeron Signed Jersey (JSA)
Framed Patrice Bergeron Facsimile Laser Engraved Signature Auto Boston Bruins 14x17 Hockey Photo - Hall of Fame Sports Memorabilia
Patrice Bergeron Signed Framed Boston Bruins Black Adidas Authentic Jersey
Autographed Boston Bruins Jerseys, Autographed Bruins Jerseys, Bruins Autographed Memorabilia
Patrice Bergeron signed jersey autographed NHL Boston Bruins JSA COA
Patrice Bergeron Boston Bruins Signed Autographed Black Custom Jersey –
Patrice Bergeron Autographed Boston Bruins Alt Retro Adidas Jersey - NHL Auctions
Patrice Bergeron #86 Facsimile Signed Reprint Laser Autographed Funko POP! Hockey NHL: Boston Bruins Figurine with Protector Case - Hall of Fame Sports Memorabilia