Bruton injured his shoulder during a special teams play. It appears that Bruton's injury happened because of a cheap shot from a Colts special teams player.
One solitary Colt runs toward the Broncos -- and Bruton, specifically -- and the others drop back. pic.twitter.com/0GrUJJUQjr— Andrew Mason (@MaseDenver) September 8, 2014
As you can see in this shot from Andrew Mason, one Colts player runs right toward Bruton and gave him a cheap shot resulting in the injury.
RT @wtuten21: you see that cheap shot dude took on Bruton on the kickoff?!--->>>i'm told those shots are common on special teams— Vic Lombardi (@VicLombardi) September 8, 2014
When more on Bruton becomes available we will update this post.