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Jack Dempsey, Associated Press
Denver Broncos runningback Knowshon Moreno signs autographs during NFL training camp at the Denver Broncos football training facility in Englewood, Colo., on Friday, July 29, 2011.

ENGLEWOOD, Colo. — Willis McGahee won't be the only new running back in Denver's backfield if Knowshon Moreno can help it.

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Noticeably leaner, the Broncos' top draft pick in 2009 reshaped his body through vigorous offseason workouts and insists he'll finally be able to flash his true talents in his third NFL season.

Little has gone right for Moreno since former Broncos coach Josh McDaniels made him his top draft pick in 2009. He's had more significant injuries (three) in the NFL than 100-yard games (two). And he hasn't been the big-play threat many envisioned or the sure thing in short-yardage many expected.

Knowing this is a make-or-break year for him, the third-year tailback from Georgia came to camp with a slimmer torso and bulging biceps, less body fat and more strength.