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Whoa. This is a huge gut call, but hear me out on this one.
Arian Foster has had hamstring issues in the past. Hamstring issues are directly correlated to lack of nutrition or hydration while your body is under extreme duress such as, you know, being an NFL running back. I'm not a doctor or a sports nutritionist, but I've been an athlete and hamstrings are lingering, nagging injuries.
Foster is healthy now, but he decided to go vegan on us a month before training camp. There are obviously no reports that he looks terrible out of training camp and since he's Houston's star back, he's probably not doing much anyway. Plus, training camp reports can be unreliable.
Being a running back—a workhorse back, no less—is one of the most physically demanding jobs on the planet. To put your body through a change where it is not getting nutrition in the same way as before is a dicey situation. And if his nutrition suffers, the hamstring problems are likely to come back.
But none of that concerns me as much as Ben Tate, the guy Houston drafted before Foster broke out and became "the guy." Tate is an absolute monster and could be more talented than Foster in terms of physical skills.
If one thing or another happened and Tate ended up supplanting Foster, I wouldn't be surprised one bit.