The Oakland Raiders will sign Jon Gruden to one of the longest coaching deals in NFL history — a 10-year contract likely approaching $100 million — when it is made official Tuesday, sources told ESPN’s Adam Schefter on Friday.

The length of Gruden’s contract is not unprecedented. The Cowboys gave Jimmy Johnson (in 1989) and Tom Landry (in 1964) 10-year deals as well.

The Raiders have called a significant news conference for Tuesday, at which time they will introduce Gruden as the team’s next coach, a league source confirmed to ESPN.

Jon Gruden never wanted to leave the Raiders — and now he’s back

Chucky’s back, Raider Nation. Nearly 20 years to the day he was hired by Al Davis, Gruden will exit the broadcast booth and rejoin the Raiders’ staff.

Of five coaches who returned to the NFL after a lengthy break, only one had more success in his second stint.

Rich Gannon: We’ll find out ‘how tough’ Derek Carr is if Jon Gruden is Raiders coach

Jon Gruden can propel Derek Carr and the Raiders to new heights, former Oakland QB Rich Gannon said Thursday, but Carr has to embrace being pushed.

Gruden, who coached Oakland from 1998 to 2001 and has been working as an ESPN analyst, is returning to the Raiders to replace Jack Del Rio, who was fired after the regular-season finale on Sunday.

ESPN reported Saturday that Raiders owner Mark Davis was prepared to pursue Gruden with a strong offer that could include an ownership stake in the team, which would have to be approved by NFL owners.

According to ESPN Stats & Information, only three current Raiders players have a contract with an average annual value of at least $10 million — Derek Carr ($24.97 million), Kelechi Osemele ($11.7 million) and Gabe Jackson ($11 million).

The date of the official announcement was first reported by RaidersSnakepit.com.

The NFL on Friday said the Raiders have complied with the Rooney Rule in their coaching search.

“We believe the Rooney Rule was complied with. Minority candidates were interviewed,” NFL executive vice president of communications Joe Lockhart said during a conference call Friday. “We’ll see what decision they make.”

The Raiders have not identified their candidates for the head-coaching job.

Gruden will become the 12th head coach since 1960 to have multiple stints with one team, and the 16-year gap between jobs with the Raiders is the largest in NFL history for a head coach with the same team.