Willie Lee Thomas appeals the four-year sentence that was imposed following the revocation of his term of supervised release. He argues for the first time in this appeal that his sentence is improper because it was based on the district court’s erroneous belief that he qualified as a career offender under the Sentencing Guidelines. Thomas has not shown that the district court committed an obvious error that affected his substantial rights. See United States v. Valenzuela-Quevedo, 407 F.3d 728, 732-33 (5th Cir.), cert. denied, — U.S. —, 126 S.Ct. 267, 163 L.Ed.2d 240 (2005). Consequently, he has shown no plain error in connection with his sentence. See id.

Thomas also argues that the district court should not have relied upon the pre-sentence report (PSR) that was prepared in connection with his original offense. Because this claim was raised for the first time in Thomas’s reply brief, we decline to consider it. See United States v. Avants, 367 F.3d 433, 449 (5th Cir. 2004). The judgment of the district court is AFFIRMED.