Was traded by the New England Patriots to the Kansas City Chiefs on February 28, 2009.
(8 September) Named the Patriots' starting QB after Tom Brady suffered a season-ending knee injury the day before against Kansas City. Cassel has not been a starter since high school. (2008)
Was placed under the franchise tag of the Patriots. He is set to earn $14.6 million in 2009 if he is not traded before the 2009 season. (February 2009)
Traded to the Kansas City Chiefs along with fellow Patriot Mike Vrabel for a second-round draft pick for New England. (February 2009)
Released by the Buffalo Bills. [September 5, 2015].
Signed to the Buffalo Bills practice squad. [September 8, 2015].
Traded to the Dallas Cowboys. [September 22, 2015].