Tom Savage was forced out of the game against the 49ers after taking a huge hit.  The Texans QB appeared to be convulsing involuntarily after the play.

That's not something you want to see happen on the field.  Savage attempted to get back on the field but the team doctor's wouldn't let him. 

Then they somehow did let him back in the game.  I'm no doctor but if your head hits the ground and your body shakes uncontrollably that's probably not good.

Pretty sure #TomSavage got knocked out. pic.twitter.com/JD92vEpna8

— ObisKanobis (@ObisKanobis) December 10, 2017