Kansas City, Mo. ? Charlie Weis is back in the NFL.

Barely a month after getting fired at Notre Dame, Weis signed on Friday as offensive coordinator with the Kansas City Chiefs, where he’ll join two old friends in trying to revive a flagging franchise that’s won only 10 games in three years.

“This marriage seemed very, very simple,” Weis said. “I’m very excited to be a part of a growing process that has been started here in the last year.”

In an interview on Wednesday, Weis virtually confirmed that he was coming to Kansas City to rejoin coach Todd Haley and general manager Scott Pioli.

Pioli was a front-office executive in New England when Weis was offensive coordinator for the Patriots’ four Super Bowl teams, and Weis shared a small office with Haley for three years when they were assistants with the New York Jets.

“My relationship with Todd and my relationship with Scott and several other persons in the organization made Kansas City look like a fine landing spot for me,” Weis said. “I couldn’t be more pleased.”

Weis, 53, indicated that other NFL teams expressed interest. Although his five-year record of 35-27 at Notre Dame did not pass muster with the Fighting Irish, his credentials as an offensive coordinator were never questioned while helping the Patriots win three Super Bowls.

“There were plenty of places that were out there that were opportunities,” he said. “Right from the start, Kansas City was a place that intrigued me. Knowing Todd and Scott, and the players on the team, there were just so many things that intrigued me.”

He and Haley spent much of last week together after the Chiefs beat Denver in the regular-season finale to finish 4-12 in Haley’s first season.

“Charlie brings with him a terrific, a tremendous resume of having success coaching offense and running offenses,” Haley said. “This, to me, is as perfect a fit as we could have here.”

Weis and Haley both are strong-minded men and in one of those interesting career twists that happen in all professions, the old boss has become the new underling.

When they first shared an office, Weis was the Jets’ receivers coach and Haley was his assistant. Then Weis became offensive coordinator and Haley became his receivers coach.