"He's been an NBA performer day in and day out," Texas A&M coach Billy Kennedy said. "I'm really proud of him. He came back to finish strong and do something special for this program and for the university."
Williams, a 6-foot-10 power forward, is ESPN's No. 6-ranked draft-eligible prospect. He averaged 10.3 points and 9.3 rebounds as a sophomore this season.
"It's just a blessing," Williams told the Houston Chronicle. "Every kid dreams of going pro in a sport they love. Just knowing I have a chance, an opportunity to receive that blessing is great."
Williams had 12 points and 8 rebounds in the Aggies' 99-72 loss at Staples Center.