He previously served as the offensive coordinator for the Cleveland Browns, Miami Dolphins, Kansas City Chiefs, Alabama Crimson Tide, and Buffalo Bills.

Born in Welland, Ontario, Canada on April 14, 1975, Daboll was raised in the United States by his grandparents in nearby West Seneca, New York.

Daboll attended Saint Francis High School in Athol Springs, New York and was a letterman in football.

Daboll coached quarterbacks Chad Pennington, Kellen Clemens, and Brett Favre during his tenure in New York.

In 2009, Daboll joined the Cleveland Browns as offensive coordinator, reuniting with new head coach Eric Mangini, whom he worked alongside in New England and on the New York Jets.

[8] On February 6, 2012, the Kansas City Chiefs announced the hiring of Daboll as offensive coordinator, replacing the retired Bill Muir.

Six days later, the Patriots lost to the eventual Super Bowl champion Baltimore Ravens 28–13 in the AFC Championship Game.

On January 4, 2018, Daboll was named the new offensive coordinator for his hometown team, the Buffalo Bills, under head coach Sean McDermott.

They defeated the Minnesota Vikings 31–24 in the NFC Wild Card Round, their first postseason victory since winning Super Bowl XLVI in 2012.

[23] In week 2 of the 2024 NFL season, Daboll was widely criticized for not having a backup kicker when Graham Gano sustained an injury on the opening kickoff.

[24] He was also widely criticized of how he handled Daniel Jones, including benching him, demoting him to a fourth string QB and eventually cutting him.