A source close to Cassel has confirmed that Cassel has agreed to a six-year deal with the Kansas City Chiefs, who are now run by former Patriots vice president of player personnel Scott Pioli. The source said that the deal pays Cassel top five quarterback money.

Update (2:50 p.m.): The source has confirmed, as first reported by ESPN, that Cassel's deal is for $63 million over the six years, $28 million guaranteed.