In the of S.B.

Opinion by:

SARAH B. DUNCAN, Justice.

S.B. appeals the trial court’s judgment, which modifies his probation disposition and commits him to the Texas Youth Commission. Because the trial court was not authorized to commit S.B. to TYC, we reverse the judgment and remand the *718cause for further proceedings consistent with this opinion.

Factual and ProceduRal Background

On March 15, 2001 S.B. was adjudicated to have engaged in delinquent conduct for committing misdemeanor assault causing bodily injury. Tex. Pen.Code Ann. § 22.01(a)(1); § 22.01(b)(Vernon Supp. 2002). S.B. was granted probation, including…