Boulder, Colo. ? Brian Calhoun, the leading rusher for Colorado last season, is on the verge of transferring to another school.

David Hansburg, Colorado’s director of football operations, said an exit interview with Calhoun was conducted this week and only a “matter with the registrar’s office” was holding up the release.

Calhoun, of Oak Creek, Wis., said he had contacted Wisconsin and schools in the Big East, Big Ten and Southeast conferences.

Two other potential starters — cornerback Sammy Joseph and defensive end Marques Harris — and reserve offensive linemen Fredrick Staugh and Del Scales will not be back this season.

The school is awaiting word on the possible transfer of a sixth, undisclosed player, Hansburg said.

Calhoun led the school in rushing last fall as a sophomore with 810 yards and five touchdowns. Last fall, he said he considered leaving after his position coach, Eric Bieniemy, left for UCLA.

“My reason for leaving is far different than everybody expects and thinks,” he said this spring. He has said it had nothing to do with the recruiting scandal that led to coach Gary Barnett’s suspension.

Joseph, a Marrero, La., native, is transferring to Louisiana State. Barnett has said race issues on campus were a factor in Joseph’s decision, though the player has disputed that.

Hansburg said Division I-AA schools have called CU inquiring about Harris, who must drop a division to play immediately in his final season of eligibility. He missed much of last year with a broken leg.