49er beat writer Matt Barrows said the question has been posed to him a number of times whether RB Anthony Dixon can/will overtake Glen Coffee for the role of No. 2 running back.
I don't think so, at least not at the start of the season. A rookie running back may dazzle when he has the ball in his hands, but whether he gets playing time depends on how quickly he can learn and master pass blocking. Coffee does this well already while Dixon is just learning. His hamstring injury also means he didn't have a chance to make up any ground in June.