Browns were completely out of their mind trading up one pick to get this kid. Physically, he is a beast but he's not versatile, he's not that fast, and he's not a great blocker.
In today's game you need a running back who can not only run the football but catch out of the backfield and pass block. He should do fine as a workhorse back but he will never turn out to be worthy of a number 3 overall selection.
Running backs are a dime a dozen nowadays:
Rice (late 2nd round)
Jones-Drew (late 2nd round)
McCoy (late 2nd round)
Gore (3rd round)
I could go on and on and on and on. The only early draft pick I can think of is Adrian Peterson and T-Rich doesn't even come close to Peterson.
This will go down as an awful pick. Not saying he will be a bust but you don't use 3rd overall selections on running backs unless they are once in a generation.