Warren Sapp too has retired this year. As the NFL site mentions this is a bit ironic that he and Favre retire the same year, given the history of trash talking between these two when they still played in the same division.
On a side note, here is a player that played 13 years in the league, and yet according to the NFL report was fined only twice in that entire time. (one for that infamous hit after an interception on the green bay player)
The fact that as a defensive lineman he could play so many years with so few fines, and yet a player like Wilfork is fined 3 times in a single season I think is reflective of a classy, skilled player (even with all the trash talk) vs. a dirty player who uses illegal hits to achieve an end rather than talent.