NEW YORK — The NFL’s longest-serving on-field official was among five who have opted to take a leave of absence for the 2020 season.

Line judge Jeff Bergman, who was entering his 29th year of service, headlined the list released Friday.

Also in the group was back judge Steve Freeman, who was entering his 20th year. He is part of the league’s only father-son duo in the officials ranks. Freeman is a former NFL player who spent 12 of his 13 seasons with the Bills. His son, Brad, a back judge, is entering his seventh season.

Also opting out are field judges Greg Gautreaux and Joe Larrew and back judge Tony Steratore.

The league said additional officials will be hired and announced.

Officials are able to opt out under the protocols negotiated through the NFL.