Indianapolis Colts running back Nyheim Hines suffered 

 a concussion after being hit hard in Thursday night's game against 

the Denver Broncos was later 

ruled out with a concussion. 

was injured in He staggered to his feet 

and was taken to the changing room for examination.

is an aspect of the concussion protocol currently being discussed by

the NFL and the NFL Players Association 

after Miami Dolphins quarterback Tua Tagovailoa suffered 

a concussion in Thursday night's game in Cincinnati.