In today's NFL teams often employ running backs with specialized skills. There are speedy third down backs for catching passes out of the backfield, stout backs for short yardage plays, and feature backs for all the other plays.

Today we celebrate Hall of Fame running back Marcus Allen, a player who could do it all. Need a back to run past defenders on the outside? Allen had speed to burn. Need tough yards up the middle? Hand the ball to Allen and watch him soar over the pile. Pass receiving? Yes, he also excelled at that.

After a stellar college career at USC, during which he won the Heisman trophy in 1981, Marcus Allen dominated defenses in the NFL. He rushed for 12,243 yards and caught 587 passes for 5,412 yards during his career. He scored 145 touchdowns, including a then league record 123 rushing touchdowns, and was elected to six Pro Bowls over the course of his career.

Allen was the first player ever to gain more than 10,000 rushing yards and 5,000 receiving yards during his career.

He was inducted into the College Football Hall of Fame in 2000 and the Pro Football Hall of Fame in 2003.

What was Marcus Allen's greatest career accomplishment?