Brent is the #4 RB right now, but he has gotten a little hype during the off-season about making some big plays in practice and on the practice squad
I doubt he sees much, if any, significant PT this year (2016)
But by the 2017 he could be about 6'2", 230lbs and probably runs around a 4.55 in the 40
(and really has even better long speed than he does short-distance burst)
I wouldn't be shocked if he's able to play a role similar to Prosise during his RS Junior (2017) and RS Senior (2018) seasons......though I would be shocked if he was putting up nearly 1,500 total yards in those seasons (as Prosise did in 2015)
He's a high-upside athlete who hasn't been able to find his way onto the field yet, largely due to a lack of focus and effective practice/preparation habits