Bears' Stephen Carlson: Placed on IR with collarbone injury

The Bears placed Carlson (collarbone) on injured reserve Saturday, Scott Bair of Marquee Sports Network reports.

Carlson suffered a serious collarbone injury during Thursday's practice session, just two days after being signed from the Bears' practice squad to the active roster. He'll be forced to miss at least the next four games, so the earliest Carlson can return is Week 9 against the Cardinals on Nov. 3.