it's been the first time that a player has had both speed and vision in one package. Lane has OK vision, so did AJ. Biakabutuka and others had speed to a degree, but none of them other than AJ could ever really hit the hole. Foster hits the hole hard and fast - Lamar hits the hole hard and is on what most would call his last legs. It's not at all a surprise that a guy with Biakabutuka's speed but with good technique and vision would be a pleasant surprise, and to tell the truth Foster was just as talented as Green.
It's all but certain that Foster is not only the starter by mid-season, but that he's got the hands and speed to be that complete Edgerrin James-type back...enough that it would cost too much to get a change of pace or backup type player to eclipse his skills as a pass receiver and route runner. Not as talented as Edge, but on that same EJ - Curtis Martin type
With all that in mind, the 3rd string battle will either be really important or completely irrelevant - it's doubtful that player will play much this year. It's in my mind that if Lamar's not a starter that he won't be here as a backup next year.
That leads me to believe we'll probably end up needing to acquire a quality backup with good running skills and not much more.
And I do believe it's in the best interest of Foster, the team, and the franchise if Foster starts and Smith is used liberally, at first.