AFC North 2021: Ravens' Lamar Jackson and other players on rookie contracts who are key to each team's success

There's no denying that free agency has changed the landscape of professional football. More than a third of the Super Bowl LV champion Buccaneers' starting lineup was either not drafted by Tampa Bay or started their careers elsewhere. Given the impact of free agency, it's safe to say that the 1979 Steelers will be the first and last Super Bowl champion whose entire roster was comprised of homegrown talent.