“It's terrible, you hate to see it,” Pagano said. “He put so much time and effort into working on his craft to be a great pro. We all know Austin's history and what he's been through and dealt with, with his concussions. To get back out there and have this happen, I feel awful (for him)."
Collie missed the first two games this season recovering from a concussion suffered during the preseason. He has a history of concussions dating back two years ago when he missed several games.
To fill Collie's spot, the Colts picked up rookie receiver Nathan Palmer off the San Francisco 49ers practice squad. Palmer played at Northern Illinois with Colts backup quarterback Chandler Harnish.
Palmer, who is 5-foot-11, 195 pounds, is a native of Elkhart. He will immediately join the active roster, per the rules of signing another team's practice-squad player. He caught 47 passes for 695 yards at Northern Illinois last season.
"Nathan Palmer, we evaluated him coming out (of college) and had a pretty good grade on him," Pagano said. "He's a productive guy. We're excited to get him in here and get him going."
Palmer wrote on Twitter his thanks to the 49ers. He followed that comment with "I'm excited for a new opportunity in my home state!"
The Colts have a bye this weekend and return to action at home against the Green Bay Packers the following week.