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Cassel's success with the Pats didn't carry over to KC.
The Kansas City Chiefs thought Matt Cassel was the answer. He has obviously been quite a disappointment for the team.
Cassel took over as the Patriots' starting quarterback after Tom Brady injured his left knee in the first game of the 2008 season, ironically against the Chiefs.
He completed over 63 percent of his passes and threw for 3,693 yards and 21 touchdowns. He led the Pats to 11 victories and also rushed for 270 yards and two scores.
After his strong season, Cassel signed a lucrative six-year deal with the Chiefs worth $63 million. Since then he has not had the type of success that he had in his only season as a starter with the Patriots.
A backup to Carson Palmer and Matt Leinart while with the USC Trojans, Cassel had never been a regular starting quarterback at an elite level.
He never again came close to his solid 2008 completion percentage, and he only connected on a disappointing 55 percent of his passes during his first season in KC.
Cassel threw just as many touchdowns (16) as he did interceptions in 2009. His QB rating dropped below 70 that season after it was 89.4 as a starter with the Patriots.
He only played in 18 games in the last two seasons, missing a considerable amount of time due to multiple injuries. In 2012, Chiefs fans cheered when Cassel was knocked out of a home game against the Baltimore Ravens.
Even in his best season with the Chiefs, he did not even come close to reaching the 327 completions and nearly 3,700 yards he collected in one season as the Patriots' starter.