Ron Rivera is the new head coach of the Washington Redskins, and Bill Callahan won't be staying.

According to John Keim of ESPN.com, Callahan, who served as the Redskins' offensive line coach before taking over as interim head coach after Jay Gruden was fired earlier in 2019, will not be a member of Rivera's staff.

This doesn't come as much of a surprise.

New coaches generally want their own assistants, especially when it comes to veterans like Rivera.

Callahan had been Washington's offensive line coach since 2015. He was also elevated to the role of assistant head coach in 2017, which was why he was first in line to grab the reins after Gruden was dismissed.

The 63-year-old landed his first NFL coaching job back in 1995, when he was named the Philadelphia Eagles' offensive line coach.

He held that position for three years before joining the Oakland Raiders as an offensive coordinator in 1998, and in 2002, Callahan was promoted to the Raiders' head coach after Jon Gruden departed for the Tampa Bay Buccaneers.

Callahan led Oakland to a Super Bowl appearance during his first season, but after a miserable 2003 campaign, he was fired. He then headed to the college ranks, where he took over as Nebraska's head coach in 2004.

He made his way back to the NFL in 2008, joining the New York Jets as an offensive line coach. After four seasons with the Jets, Callahan linked up with the Dallas Cowboys in 2012, taking the offensive coordinator job.

The Chicago native was a member of the Cowboys' staff for three seasons before ultimately joining the Redskins.

Washington went just 3-13 this year.