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Corey Matthaei enters his 10th season with the Chiefs and fifth as the team's assistant offensive line coach in 2022.

Corey Matthaei enters his 10th season with the Chiefs and fifth as the team's assistant offensive line coach in 2022.

For the 2021 season, Matthaei helped a group of veterans and rookies merge into an offensive line that only allowed 28.0 sacks on QB Patrick Mahomes, which was tied at third for the season. Prior to the season, T Orlando Brown joined the club via trade with the Ravens, and following the season, he earned his third Pro Bowl nomination. Rookie offensive linemen Creed Humphrey and Trey Smith started all 17 regular season games in 2021, becoming the 17th and 18th players in franchise history to start all regular season games in their rookie season.

In 2020, Matthaei helped lead an offensive line that was marred by injuries, seeing 12 different starters at various positions along the line throughout the season while still ranking fifth in sacks allowed with 24.0.

In 2019, Matthaei assisted an offensive line unit that finished third in the NFL in sacks allowed with 25.0 in the regular season.

In his first year as the assistant offensive line coach, he helped lead a group that blocked for NFL MVP QB Patrick Mahomes. The offensive line only allowed 26.0 sacks in the regular season and paved the way for 1,855 yards rushing as a team.

Prior to the 2018 season, Matthaei served as the team's assistant quarterbacks coach from 2015 to 2017. In addition to tutoring the quarterbacks, Matthaei assisted offensive line coach Andy Heck, working with the offensive line.

Before being promoted in 2015, Matthaei was an offensive quality control coach for two seasons with the team (2013-14) and spent five seasons with the Philadelphia Eagles as a coaching assistant (2008-12).

Since Matthaei's arrival in Kansas City in 2013, he assisted QB Alex Smith in owning a 65.1 completion percentage, which ranks first among all Chiefs quarterbacks with at least 700 passing attempts. Under Matthaei's guidance, Smith recorded five consecutive seasons passing for 3,000 yards since joining the franchise in 2013. Smith became the franchise's all-time leading rusher among QBs after the 2017 season (1,672 yards).

In 2013, Matthaei assisted an offensive staff that propelled the Chiefs to the single best season turnaround in franchise history, winning 11 games after a 2-14 season.

Prior to his move to Kansas City, Matthaei served three seasons under Chiefs Head Coach Andy Reid with the Philadelphia Eagles as the assistant to the head coach from 2010-12 after completing two seasons with the Eagles as a coaching assistant (2008-09). He spent 2006-07 as Philadelphia's football operations intern for training camp.

Before embarking on his NFL career, Matthaei played on the offensive line at Willamette University in Salem, Ore., (2003-06). Upon graduating, he spent one season as the offensive assistant at his alma mater.

Education: ­Willamette University (B.A. 2007). Born: Fircrest, Wash. Family: Wife - Cari; Children - Taylor, Brayden and Kacey.