While the Buffalo Bills and the New England Patriots have a storied rivalry that continues to this day, former Bills’ quarterback Jim Kelly isn’t afraid to heap praise on the Patriots’ star quarterback, Tom Brady.

Kelly told ESPN Monday night that Brady is the best quarterback of all time, and that "I don't mind saying that." Kelly cited Brady's consistency over his lengthy career, his ability to succeed even when he hasn't had the best players around him and his ability to avoid hits as reasons why Brady is the best.

Kelly and Brady have developed a close professional relationship over the years, and Brady revealed one secret to his continued success: continuity of coaching staff. Brady, 39, is in his 17th NFL season and Kelly joked that he asks Brady when he’s going to retire each season. Brady has said he wants to continue playing for several more seasons.