During his career in Tennessee, Fisher usually had one running back carry most of the load. With the Rams, it's been more of a committee approach, although Zac Stacy settled into the main role for the final 12 games of the 2013 season.
This year, Stacy had 66 carries, Benny Cunningham 40 and rookie Tre Mason 30. Mason had had all his attempts in the last three games after being inactive for the first four games of the season.
Fisher hinted it could change. He said, "When they got their opportunities they all were productive. The average per carry is about the same. We'll see. We may settle into something this week."
Reading between the lines, it sounds as if this committee could clear up this week, though a bad matchup with the 49ers doesn't help. We'd recommend that Mason owners hold another week to see if Fisher is referring to a scenario where the rookie is in the lead role. Despite what Fisher says, his YPC (5.2) is a good bit more than those of Benny Cunningham (4.1) and Zac Stacy (3.9), though the rookie is not trustworthy in pass protection.