The number of carries and red-zone rushing attempts a running back receives is vital to his production and fantasy appeal. But the number of touches a runner sees during the course of a season is an even truer testament to his value on the field and in fantasy land. That's even more important now, as featured backs have become mostly extinct around the league. Here's our look at the busiest backs in the NFL last year, and what owners can expect from them in 2011.
T-19. Ronnie Brown, Dolphins (233 touches): The Dolphins will have a new backfield look this season, as rookie Daniel Thomas could see a featured role. The fact that Brown, a free agent, saw 22.4 percent of the team's touches in 2010 bodes well for his chances to make a fast impact, wherever he plays.