Senn went undrafted in 2008 and played his first year and a half with the Indianapolis Colts before joining the Carolina Panthers in 2009. In five seasons with the Panthers, Senn started just seven games, all of which came in 2011.
His value is purely on special teams. In fact, he was a special teams captain for the Panthers last year. The signing of Senn makes it very unlikely the Bears will retain free-agent linebacker Blake Costanzo.
Jeremy Stoltz is Publisher of BearReport.com and a member of the Pro Football Writers of America. He is entering his fourth season covering the Chicago Bears full time. Follow Bear Report on Twitter and discuss this topic on our message boards. To become a subscriber to the Bear Report Web site or magazine, click here.