MEMORANDUM ***

Jesus Marroquin-Frias appeals his within-Guidelines, 51-month sentence for illegal reentry into the United States in violation of 8 U.S.C. § 1326(a) & (b). Because of his prior convictions for robbery and assault with a firearm, the district court enhanced Marroquin’s base offense level by sixteen levels in accordance with U.S.S.G. § 2L1.2(b)(l)(A)(ii). Marroquin argues his sentence is unconstitutional and both procedurally and substantively unreasonable. We have jurisdiction pursuant to 28 U.S.C. § 1291 and we remand for re-sentencing.

We review challenges to the constitutionality of a sentence de novo, United States v. Raygosa-Esparza, 566 F.3d 852, 854 (9th Cir. 2009); we review the substantive and procedural reasonableness of a sentence for an abuse of discretion. United States v. Carty, 520 F.3d 984, 993 (9th Cir. 2008). As an initial matter, consistent with a number of our prior decisions, we reject Marroquin’s claims that the prior conviction exception in Almendarez-Torres v. United States, 523 U.S. 224, 118 S.Ct. 1219, 140 L.Ed.2d 350 (1998), has been implicitly invalidated and that the doctrine of constitutional avoidance requires capping his sentence at two years. 1 See, e.g., United States v. Grisel, 488 F.3d 844, 846-47 (9th Cir. 2007) (en banc).

Next, Marroquin argues the district court failed to adequately respond to his arguments at sentencing, thereby rendering his sentence procedurally unreasonable under 18 U.S.C. § 3553(c). The district judge directly questioned Marroquin’s counsel at sentencing regarding his arguments for a variance. The district judge further explained that she had reviewed the information submitted by the parties and had considered the Guidelines and the *793 § 3553(a) factors in making her sentencing determination. In a relatively simple case such as this, especially where the judge imposed a Guidelines sentence, no further explanation was required. See Rita v. United States, 551 U.S. 338, 356-58, 127 S.Ct. 2456, 168 L.Ed.2d 203 (2007); Carty, 520 F.3d at 992.

Finally, Marroquin argues his sentence is substantively unreasonable because his qualifying crime-of-violence convictions are twenty-three years old and he has no subsequent violent criminal history. We vacate Marroquin’s 51-month sentence and remand this case to the district court to reconsider the weight to be afforded Marroquin’s 23-year-old convictions in light of our recent decision in United States v. Amezcua-Vasquez, 567 F.3d 1050 (9th Cir. 2009), which had not yet been decided at the time of Marroquin’s sentencing.

VACATED and REMANDED.