FILE - This Dec. 7, 2008, file photo shows Tennessee Titans center Kevin Mawae gestures as he leaves the field after beating the Cleveland Browns 28-9 to win the AFC South title in an NFL football game in Nashville, Tenn.  An official with knowledge of the announcement says Kevin Mawae, president of the NFL Players Association, is retiring from the NFL after 16 seasons and eight Pro Bowls. (AP Photo/John Russell, File)

Photo by: John Russell

FILE - This Dec. 7, 2008, file photo shows Tennessee Titans center Kevin Mawae gestures as he leaves the field after beating the Cleveland Browns 28-9 to win the AFC South title in an NFL football game in Nashville, Tenn. An official with knowledge of the announcement says Kevin Mawae, president of the NFL Players Association, is retiring from the NFL after 16 seasons and eight Pro Bowls. (AP Photo/John Russell, File)