OKLAHOMA CITY (Ticker) -- Kelvin Sampson's 400th career victory did not come easily.
Eighth-ranked Oklahoma was held without a field goal for the final 8:43 but held on to edge Princeton, 58-55, in the All-College Classic.
De'Angelo Alexander scored 22 points to pace the Sooners (10-0), who held a 56-43 lead before the Tigers tightened their defense and pulled within 58-55 on a backdoor layup by Scott Greenman with 6.6 seconds left.
Sooners guard Jason Detrick missed a pair of free throws with 5.4 seconds to play, and after the Tigers (5-5) grabbed the rebound, Princeton guard Ed Persia raced up the court and launched a game-tying 3-point attempt from about 10 feet behind the top of the arc. But the ball hit the front of the rim and bounced away, allowing Sampson to improve to 400-229 in his 21st season as a head coach.
Sampson is 224-81 in 10 campaigns with the Sooners, who were outshot, 49 percent (21-of-43) to 44 percent (19-of-43).
Both teams made four 3-pointers, but Oklahoma attempted 21 and Princeton just 10. The Tigers outscored the Sooners in the paint, 26-16.
Persia had 19 points and Greenman 14 for the Tigers, who have lost four of five.
The Sooners trailed at the break, 27-26, before Kevin Bookout made a jumper 20 seconds into the second half to take the lead for good. Alexander extended the advantage to 40-30 on a 3-pointer six minutes later and Princeton got no closer than three points thereafter.