As league gets more physical, 'workhorse' backs may disappear
By Scott Kellogg | Jan. 27, 2010With the Minnesota Vikings' heartbreaking overtime loss to New Orleans last Sunday came the end of the season for running back Adrian Peterson. And it was a strange year for Peterson. In 2008, he turned in a phenomenal campaign, rushing for a league-best 1,760 yards, averaging 4.8 yards per carry and running for at least 100 yards 10 times.









