Justin Fields’ career with the Chicago Bears didn’t go the way many people expected it to, in part due to his own struggles but also because of the team’s unstable environment. Now, he has a chance with the Steelers to rewrite the narrative around him. Although he’s currently slotted as the backup behind Russell Wilson, he doesn’t seem afraid of the idea of competing for the starting job. It hasn’t been very often in NFL history that a backup quarterback has replaced the starter and gone on to forge a legacy of greatness, but arguably the greatest-ever backup turned starter recently had some words of wisdom for Fields.