Panthers' Keith Kirkwood: Begins season on IR

The Panthers placed Kirkwood (shoulder) on injured reserve Monday, Myles Simmons of the team's official site reports.

Kirkwood suffered a broken clavicle during training camp and underwent surgery to repair the injury. The 26-year-old receiver won't be eligible to return until the Panthers' Week 4 game versus the Cardinals, which will take place nearly seven weeks after Kirkwood suffered his injury.