On February 8, 1996, Warhop was hired by the St. Louis Rams as their co-offensive line coach.[9] In the 1997 NFL draft the Rams took offensive tackleOrlando Pace with the first overall selection. Pace held out of training camp for three weeks to get a bigger contract, and Warhop was angry, stating that Pace "lost a good part of the year." In an attempt to speed up the playbook-learning process, Warhop was assigned as a special tutor for Pace.[10]
Arizona Cardinals
On February 10, 1998, Warhop was hired by the Arizona Cardinals as their offensive line coach.[11] His contract expired at the conclusion of the 2002 season, and was not re-signed.[12]
Dallas Cowboys
On January 16, 2003, Warhop was hired by the Dallas Cowboys as their offensive line coach, following his tenure with the Cardinals.[13] In 2003 and 2004 the Cowboys' offensive line only allowed 37 sacks, while in 2002, the year before Warhop was hired, they surrendered 54 sacks.[14] After two seasons with the Cowboys, Warhop was fired on January 7, 2005.[15] Shortly after he was fired, he interviewed for the Florida State Seminoles' offensive line coach position,[16] but did not get the job.
San Francisco 49ers
On January 27, 2005, Warhop was hired by the San Francisco 49ers as their offensive line coach.[17] In 2006 Warhop's offensive line allowed a league-worst 55 sacks, and the 49ers hired a second offensive line coach, Chris Foerster, to share the duties.[18] Warhop was fired in-season on October 23, 2008 after his offensive line gave up a league-worst 29 sacks to that point.[19]
Cleveland Browns
On February 4, 2009, Warhop was hired by the Cleveland Browns as their offensive line coach.[20]
On January 13, 2019, Warhop was hired by the Jacksonville Jaguars as their offensive line coach under head coach Doug Marrone. On January 19, 2021, Warhop was retained under the new head coach of the Jaguars, Urban Meyer.[21][22]
Houston Texans
On February 21, 2022, Warhop was hired by the Houston Texans as their offensive line coach.[23] He was not retained for the 2023 season.[24]
Baltimore Ravens
On August 14, 2024, Warhop took over as interim offensive line coach following the hospitalization of Joe D'Alessandris. Following D'Alessandris's death on August 25, it is likely that Warhop will remain the offensive line coach for the season.[25]