Obviously any knee injury is the biggest concern.... but logistically, its far more likely to be a hamstring/muscle strain than a ligament tear. And if his ligaments can be torn that easily, it was going to happen eventually, in a situation of worse contact.
ACL tears can be a cummulative injury. Very sudden, doesn't require a giant traumatic collision. Probably a minor tear, but when you go down like that unassisted... I doubt it was a muscle strain.
I know injuries are a part of the game, but it seems like Houston can't ever get a break. Still waiting on that three-headed monster running back trio this season. Hope AJ is ok.
man that's depressing. If as serious as it looks, here's where never bothering with a real #2 WR bites the team in the ass
They can also be diagnosed on the field fairly easily (anterior drawer sign)... enough to where if you really are suspecting it, you don't have the player walk off if he doesn't have to. I'm not saying it didn't happen, I'm just saying that out of the possible diagnoses, it isn't the most likely.