Middle linebacker Tom Wort will skip his senior season at Oklahoma and declare his eligibility for the NFL draft.
Coach Bob Stoops announced Wednesday that Wort would not be back for next season, noting that he had already earned his degree.
He's the third Oklahoma player who's leaving early, joining safety Tony Jefferson and receiver Kenny Stills.
Wort started 33 games over the past three seasons with the Sooners, after redshirting in 2009 following a season-ending knee injury he suffered during training camp.
Wort had 53 tackles, two sacks and two forced fumbles this season but his playing time diminished later on against teams with offenses focused more heavily on the pass.