Yeah, we know a couple of the players were rough with Toby (Williams, Brinkley) and he may have had exaggerated rookie hazing. Williams comments showed jealousy towards Gerhart. He said something about how he thought Toby was "overpaid" or "over hyped" and hadn't proven "nothin" yet.
Let's not be so quick to blame the injury on his teammates because of a few clowns though- as Football Dad has shown the injury- which isn't too serious- was sustained in the 3rd pre-season game. I doubt too many black teammates will take cheap shots at a white RBs knees, when coaches can bench them, it could affect their reputations if found out by the media- and could be risky to their own health, during an easy non-contact drill.
Lastly, simply being bumped into lightly in practice while running fast, twisting or turning etc. when you don't have solid footing can cause a hyper-extention of the knee. Actually Wes Welker, for instance, simply was running full speed ahead on an uneven turf and propelled his foot on the ground with a completely straight leg which caused a bad injury to him- in his last season game last year- when he wasn't hit at all.
I predict Gerhart becomes the second back before long. Gerhart was given a pretty big contract for a rookie, since he is a mid-second round pick and Albert Young looked pretty bad this pre-season and clearly lacks the talent of Gerhart. We should be happy that Gerhart was drafted higher than the previous Doak award winner, Shonn Greene, was the year before- because Toby showed better athleticism at the combine than Greene. Toby was basically the 4th back drafted this year- because McCluster will be used mostly as a slot WR by Kansas City.