I hope it's not severe. I wouldn't rush him back tho. Not sure we can still lose a game and make the playoffs, but if it works out that way, the game to lose is probably next week (out of conference).
Also, I don't blame Ngata...if the opposing QB is gonna run, then the idea in football is to drill him. He's just doing what Def are taught.
RG3 does need to learn the baseball slide. In my day, you had that perfected by 3rd grade...but then we didn't have video games back then !