OPINION *

Jesus Rodriguez-Leon appeals the District Court’s order denying his petition filed pursuant to 28 U.S.C. § 2241. For the reasons below, we will dismiss the appeal as moot.

In 2011, Rodriguez-Leon was sentenced to 46 months in prison after being convicted of illegal reentry of a removed alien in violation of 8 U.S.C. § 1326. In 2013, he filed a § 2241 petition seeking credit for time spent in custody prior to sentencing. The District Court denied the petition, and Rodriguez-Leon filed a notice of appeal. According to the Inmate Locator on the Bureau of Prisons website, Rodriguez-Leon was released on February 18, 2015. Because it appeared that Rodriguez had served his sentence, the parties were asked to address whether the appeal was moot. Appellee has filed a response, 1 but Rodriguez-Leon has not. 2

Pursuant to Article III of the Constitution, a federal court may adjudicate only ongoing controversies or cases. Burkey v. Marberry, 556 F.3d 142, 147 (3d Cir. 2009). Rodriguez-Leon sought relief which would result in his earlier release from prison, and he has now been released from prison. There is no effective relief that we could' grant him. See In re Cantwell, 639 F.2d 1050, 1053 (3d Cir. 1981) (“[A]n appeal will *855 be dismissed as moot when events occur during the pendency of the appeal which prevent the appellate court from granting any effective relief.”). Rodriguez-Leon has not argued that there are any collateral consequences caused by the denial of his sentencing credit. See Burkey, 556 F.3d at 148 (when a prisoner challenges a sentence that has been served, the appeal is moot unless he can show collateral consequences.)

Accordingly, we will dismiss the appeal as moot.