BYU linebacker Spencer Hadley's suspension was defined by the school as five games, according to reports on Tuesday night.
A university spokesman confirmed to the Salt Lake Tribune and Provo Daily Herald that the suspension, which originally was announced as indefinite, stemmed from a violation of BYU's strict honor code of conduct.
The university did not offer an explanation of the nature of the infraction and coach Bronco Mendenhall did not make a statement. The honor code prohibits premarital sex and alcohol and drug use.
The Daily Herald reported that Hadley will remain in school and work with the dean of students during the suspension.
The junior started the Cougars' first two games this season and all 13 games in 2012. He is tied for fourth on the team in tackles with 12 so far this year.
Hadley will miss Saturday's in-state battle with Utah at LaVell Edwards Stadium. His backup at the linebacker spot is senior Tyler Beck.