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Michael Marquardt (born July 10, 1982) is a former American football defensive tackle. He was signed by the Cincinnati Bengals as an undrafted free agent in 2008. He played college football at Arizona State.

Marquardt has also been a member of the Carolina Panthers, Philadelphia Eagles, St. Louis Rams and Washington Redskins.

Marquardt attended Rancho Buena Vista High School in Vista, California. He was named a Prep 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.

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. After the 2001 season he served mission for the Church of Jesus Christ of Latter-day Saints in Bahía Blanca, Argentina. He returned for the 2004 season and he played in 11 games, totaling five tackles, including one tackle for loss.

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".

Key: GP - games played; GS - games started; UA - unassisted tackles; AT - assisted tackles; TT - total tackles; T/L - tackles for a loss; Sacks - ; FF – Forced fumble ; FR – Fumbles recovered; PD - passes deflected; Int - interceptions

Marquardt ran a 4.97 forty-yard dash.^[1]

After going undrafted in the 2008 NFL draft, Marquardt signed with the Cincinnati Bengals as an undrafted free agent. He was waived by the team on July 7.

Marquardt was then signed by the Carolina Panthers, but was waived on August 6, 2008.

Marquardt was signed by the Philadelphia Eagles on August 10, 2008. He was waived by the team during final cuts, but re-signed to the practice squad on September 1.

Marquardt was signed by the St. Louis Rams on April 2, 2009, only to be released a month later on May 1.

Marquardt was signed by the Washington Redskins on August 5, 2009, after the team waived defensive tackle Vaka Manupuna. He was waived on August 30.

• Arizona State Sun Devils bio
• BYU Cougars bio
• Philadelphia Eagles bio
• Washington Redskins bio