When the Denver Broncos released running back Willis McGahee it was over money and his lack of versatility. Knowshon Moreno wasn’t only the cheaper alternative, he was the more versatile type of player that fit the third down back role.
McGahee, who would come out on passing downs and wasn't good at pass protection or catching the football out of the backfield.
According to Mike Florio of Profootballtalk.com, those are traits that Moreno excels at and made it a no-brainer in keeping him over McGahee.
‘Moreno costs $800,000 less in 2013 base salary. Also, Moreno is better suited, both in skills and temperament, to being a third-down back and, more generally, a complement to Montee Ball and Ronnie Hillman. Of course, that doesn’t mean Moreno definitely will have a Week One roster spot. Since he now has four years of service, his $1.7 million base salary becomes essentially guaranteed if he isn’t cut before the regular-season opener against the Ravens.’