"I am extremely grateful for my time as a Chicago Bear and I wish the Bears the best," Brown tweeted. "I am glad that they gave me an opportunity to realize a dream I had as a child. I appreciate the fans but as we all know this is the nature of the business. Bear down!"
Brown, who has played all eight of his NFL seasons with the Bears after being drafted out of Florida in the fourth round in 2002, apparently became expendable when the Bears signed Julius Peppers and decided to move Israel Idonije to defensive end. The Bears also are hoping for Mark Anderson to return to his rookie form, when he had 12 sacks in 2006.
ESPN Chicago's Jeff Dickerson reported on Tuesday that Brown's agent, Joel Segal, approached the Bears about a contract extension in February, according to a source familiar with the situation. The idea was quickly nixed by the Bears, according to the source.
Brown, 30, has 35½ sacks since 2004.