Is he the top RB in Miami this season?
He seems to have survived the draft and most of free agency. There are still some names out there but no real game changers. Maybe Gurley?
Maybe we just have different definitions of a RBBC.
The Dolphins rushed for 1,688 yards as a team last year; no RB had more than 584 rushing yards individually. The team scored 15 rushing TDs; no individual RB had more than 4 (and the guy who had the most yardage was not the same guy who scored the most TDs). To ME, that's a RBBC, but if you want to go with a "bellcow" that got 584 yards and 3 TDs, be my guest.
Because Brown is probly a better RB than anyone they had on the roster last year, except possibly Gaskin, and because the team showed a willingness to go RBBC last year (at least by my standards).
That's a bet you'd lose already, since they are in competition simply by being on the same team.