Chicago Bears linebacker Brian Urlacher has played his entire 13-year career in the Windy City. When the two sides couldn't agree on a new contract after last season, Urlacher insinuated a desire to test the free agent market. Urlacher won't wear another jersey, as he announced via his twitter page that he is retiring from the NFL.

"After spending a lot of time this spring thinking about my NFL future, I have made a decision to retire," Urlacher tweeted. "Although I could continue playing, I'm not sure I would bring a level of performance or passion that's up to my standards. When considering this along with the fact I could retire after a 13-year career wearing only one jersey for such a storied franchise, my decision became pretty clear.

"I want to thank all of the people in my life that have helped me along the way. I will miss my teammates, my coaches, and the great Bears fans. I'm proud to say that I gave all of you everything I had every time I took the field. I will miss this great game, but I leave it with no regret."

Urlacher put together a Hall of Fame worthy career, tabbing 1,779 tackles (most in Bears history), 41.5 sacks, 22 interceptions, and 16 fumble recoveries (second all-time behind Ray Lewis). He started 180 games for the Bears, making 8 Pro-Bowls, was named first-team All-Pro 4 times, and earned 2005 NFL defensive player of the year honors.