2015 NFL Draft: Mike Mayock's Top 5 Running Backs

Wisconsin running back Melvin Gordon (25) on his way to a 53-yard touchdown during the third quarter of the Outback Bowl NCAA college football game Thursday, Jan. 1, 2015, in Tampa, Fla. (AP Photo/Chris O'Meara)

Georgia running back Todd Gurley (3) tries to break free from Tennessee defensive back Brian Randolph (37) during the second half of an NCAA college football game, Saturday, Sept. 27, 2014, in Athens, Ga. Georgia won 35-32. (AP Photo/John Bazemore)

Nebraska running back Ameer Abdullah runs the ball during NCAA college football practice for the Senior Bowl, Tuesday, Jan. 20, 2015, at Ladd-Peebles Stadium in Mobile, Ala. (AP Photo/Brynn Anderson)

FILE - In this Nov. 29, 2014, file photo, Miami's Duke Johnson (8) runs against Pittsburgh during the first half of a NCAA college football game in Miami Gardens, Fla. Johnson announced Sunday, Dec. 28, 2014, he is skipping his senior season of eligibility with the Hurricanes and entering next year's NFL draft after a career in which he broke or tied at least 11 major Miami records. (AP Photo/J Pat Carter, File)

FILE - In this Sept. 27, 2014, file photo, Indiana running back Tevin Coleman (6) runs during the first half of an NCAA college football game against Maryland in Bloomington, Ind. College football teams have been running wild this season, averaging more yards per carry and per game than at any time in recent years (AP Photo/Darron Cummings, File)

Alabama running back T.J. Yeldon (4) runs the ball against Mississippi State defensive back Jamerson Love (5) during the second half of an NCAA college football game Saturday, Nov. 15, 2014, in Tuscaloosa, Ala. Alabama won 25-20. (AP Photo/Brynn Anderson)