6. Gale Sayers (HOF Class of 1977)
After being drafted by the Bears in 1965, Sayers immediately took the NFL by storm. In his rookie season (14 games) Sayers scored 22 touchdowns and totaled 2,272 all-purpose yards (NFL records at the time). In perhaps the most memorable of his career, Sayers scored six touchdowns in a single game against the 49ers. Unfortunately, multiple knee injuries limited Sayers to just 68 career games. If not for the injuries, NFL experts believe Sayers would have easily finished as one of the top players in League history — regardless of position.