The Colts' initial concern for Brown was his shoulder following one series of play against the Bears, but it was an elbow injury to the same arm that brough his season to a halt.
"It's more the elbow than the shoulder," head coach Tony Dungy said.
Brown's injury elevates young quarterback Tom Arth to the third-string spot following an exciting series where he moved the team nicely in the closing minute last week against the Bears.
"He'll get some work in the next two games," Dungy said.
The Colts used the roster spot created by Brown's injury to sign a former Colt Jim Newton, who played for Indianapolis in 2003 and was in their training camp last summer. Newton was recently waived by the Cardinals.
Travis Brown Placed on IR, Newton signed
Colts Blitz Top Stories
NFL Coaching Hot Seats Heading Into 2017Dr. Roto examines some NFL coaches facing the hot seat as we enter the new year!
Position capsule: Offensive lineThe Arizona Cardinals started eight different combinations along the offensive line in 16 games this season.
CardinalsSourceYesterday at 7:05 AM
4 teams have more than $20M in carryoverThe NFL Players Association released the amount of salary-cap dollars each team can carry over into their 2017 salary cap, with four teams having more than $20 million and five…
Scout NFL NetworkWednesday at 10:01 AM
Top 100 Stadium Experiences of 2016In 2016, the writers at Stadium Journey reviewed 761 different stadium experiences. We renewed our love for many of the venues that have consistently been on our best stadiums list…
Stadium JourneyMonday at 5:47 AM