Education
Marquardt attended Rancho Buena Vista High School in Vista, California.
Marquardt attended Rancho Buena Vista High School in Vista, California.
He was signed by the Cincinnati Bengals as an undrafted free agent in 2008. He played college football at Arizona State. He was named a Preparatory Star magazine All-American and named All C.I.F. and All-league as a senior.
He also earned Palomar League Most-Valuable Player honors as a senior when he had 40 tackles and a team-leading 18 sacks while forcing four fumbles and returning one for a touchdown.
Brigham Young
Marquart began his college career at Brigham Young University in 2000, redshirting that year. In 2001 he played in 10 games for the Cougars and had 11 tackles, including five tackles and three sacks.
He returned for the 2004 season and he played in 11 games, totaling five tackles, including one tackle for loss. Arizona State
Marquart sat out 2005 after transferring to Arizona State University.
In 2006 he started 12 of 13 games played and was honorable mention All-Pac-10, totaling 25 tackles (18 solo), 7.5 tackles-for-loss, 3.5 sacks.
As a senior, in 2007, he started 11 games and again earned honorable mention All-Pac-10 recognition. He totaled 23 tackles (11 solo), two fumble recoveries and 1.5 tackles-for-loss on the year. Both in 2006 and 2007 he was All-Academic Pac-10 and was a semifinalist for the 2007 Draddy Trophy, nicknamed the "Academic Hesiman".
Marquardt has also been a member of the Carolina Panthers, Philadelphia Eagles, Saint Louis Rams and Washington Redskins.