Former NFL head coach Jerod Mayo may be done for good in the league at just age 39.

Mayo was fired Jan. 5 after just one season as head coach of the New England Patriots, whom he coached to a 4-13 record after replacing Bill Belichick. Mayo played eight seasons for the Patriots and was inside linebackers coach from 2021-23.

In a wide-ranging report Sunday in the Boston Herald, Doug Kyed and Andrew Callahan noted that Mayo had not yet been hired for another NFL job despite his relative youth. According to the report, “multiple sources doubt that Mayo will return to coaching.”

Shortly after Mayo’s firing Patriots owner Robert Kraft took the blame for the rookie coach’s lack of success. The team replaced Mayo with another former New England linebacker, 49-year-old Mike Vrabel, who had been Tennessee Titans head coach from 2018-13.

“This whole situation is on me. I feel terrible for Jerod because I put him in an untenable situation,” Kraft said. “I know that he has all the tools as a head coach to be successful in this league. He just needed more time before taking the job.”

Mayo isn’t the only NFL head coach to be “one-and-done” in recent years. Frank Reich (Carolina Panthers), Nathaniel Hackett (Denver Broncos) and Lovie Smith (Houston Texans), have all gotten the hook in one season (or less, in Reich’s case), but Reich and Smith were in their 60s and Hackett was hired almost immediately as offensive coordinator of the New York Jets.

As Kyed and Callahan noted, three members of Mayo’s Patriots staff — quarterbacks coach TC McCartney, running backs coach Taylor Embree and inside linebackers coach Dont’a Hightower (a former Alabama star) — also remain out of the NFL. Ironically, Mayo’s younger brother, Deron, remains on the New England staff as head strength and conditioning coach.

Mayo’s former boss, of course, has returned to coaching as well, but not in the NFL. Bill Belichick was hired in December as head coach at North Carolina, his first college job after nearly 50 years in professional football.