FORT WORTH, Texas (AP) _ Suspended TCU quarterback Casey Pachall (PAW'-hall) is leaving school for the rest of the semester and enrolling at an inpatient rehabilitation facility.

Coach Gary Patterson made the announcement Tuesday, five days after the junior starter was arrested on suspicion of drunken driving near campus. That came eight months after Pachall admitted to police that he smoked marijuana and failed a team-administered drug test.

Patterson said most of the inpatient programs like the one Pachall will enter are 30 to 60 days. The coach said that keeps the door open for Pachall re-enrolling at TCU next spring.

Redshirt freshman Trevone Boykin threw for 270 yards and had three interceptions Saturday as Iowa State beat TCU 37-23. The Horned Frogs (4-1, 1-1 Big 12) will face Baylor (3-1, 0-1) on Saturday.