I sort of agree with the size doesn't matter arguement (Um, ask a girl though
) Tiki Barber had some success and he's about the same size as Westbrook give or take an inch. As long as Philly doesn't pound the ball between the tackles, Westbrook will do alright.
Do you think Levens may steal some quality carries from him though?
As for Brown; now he's the man for the Titans. Lots of opportunity there. Tenn has a pretty good O-line that has been left in tact since last season. He's also not an injury risk. The Titans also have a nice balance on O with their passing game. No one will be stacking the line on Brown. I expect him to be one of the better fantasy number 2 RBs you can have. Of course league size and draft position has to be taken in consideration when talking about #2 RBs. I'm looking at it from the view point of an early pick in a 12 team league
Opportunity + O-line + health + balance = good RB