Romero Osby was left to carry Oklahoma alone.
Without any help, Osby and the Sooners are all out of the tournament together.
Osby scored 22 points and had eight rebounds in the Sooners' 70-55 loss to San Diego State on Friday night. Jamaal Franklin scored 21 points and James Rahon had 17 for the Aztecs to earn their third NCAA tournament victory.
The seventh-seeded Aztecs (23-10) will play No. 15 seed Florida Gulf Coast on Sunday in the South Regional.
Osby, the first-team All-Big 12 senior guard, was 10th-seeded Oklahoma's lone sense of hope. Every time the Aztecs seemed they might stretch their lead even more, Osby was there with a short jumper or tough basket inside. Osby, though, left the court with a loss in his final game. No other player hit double digits for the Sooners.
''I want to leave a stamp of, hey, this program is back and we're on to bigger and better things,'' he said. ''We just don't want to look back from here.''
Behind Osby, Oklahoma led 33-31 at the break....