Georgia tailback Knowshon Moreno (24) gets past Western Carolina safety Chris Collins during the first half of their college football game, Saturday, Sept. 15, 2007, in Athens. Georgia won 45-16. (AP Photo/John Amis)

Georgia's Knowshon Moreno (24) carries the ball against Alabama during the second half of a football game, Saturday, Sept. 22, 2007, in Tuscaloosa, Ala. (AP Photo/)

Georgia running back Knowshon Moreno, right, is tackled by Florida linebacker Brandon Spikes, left, during the second quarter of an NCAA college football game, Saturday, Nov 1, 2008, in Jacksonville, Fla.(AP Photo/Phil Coale)

Georgia running back Knowshon Moreno runs a football drill at the NFL scouting combine in Indianapolis, Sunday, Feb. 22, 2009. (AP Photo/Michael Conroy)

Denver Broncos first-round draft pick Georgia running back Knowshon Moreno smiles as he puts on a Broncos cap at the team's headquarters in Englewood, Colo., on Sunday, April 26, 2009. (AP Photo/Ed Andrieski)

Denver Broncos rookie running back Knowshon Moreno takes part in the team's mini camp at the Broncos headqaurters in the southeast Denver suburb of Englewood, Colo., on Sunday, May 3, 2009. (AP Photo/David Zalubowski)

Denver Broncos' Knowshon Moreno walks off the field after an NFL football game against the Oakland Raiders in Oakland, Calif., Sunday, Sept. 27, 2009. (AP Photo/Marcio Jose Sanchez)

Denver Broncos running back Knowshon Moreno (27) carries the ball against the defense of the Seattle Seahawks during Super Bowl XLVIII at Metlife Stadium on Sunday, Feb. 2, 2014, in East Rutherford, N.J. (Ben Liebenberg/NFL)

Denver Broncos running back Knowshon Moreno runs with the ball during an NFL game against the Pittsburgh Steelers, Sunday, Sept. 9, 2012 in Denver. The Broncos won the game, 31-19. (Ric Tapia/NFL)