TULSA, Okla. — Derrick Williams is now 2-for-2 in game-saving plays in the NCAA tournament.

TULSA, Okla. — Derrick Williams is now 2-for-2 in game-saving plays in the NCAA tournament.

The Arizona sophomore and Pac-10 Player of the Year made his second in as many tournament games Sunday night, completing a three-point play with 9.6 seconds remaining to lift the Wildcats to a 70-69 win over Texas.

Williams also had the saving block with 2 seconds remaining in Arizona's opening 77-75 win over Memphis on Friday. He struggled for much of the game Sunday but finished with 17 points, including the final three.

"I wasn't surprised by the block against Memphis," Williams said. "I am a little surprised by the shot I made today. I haven't seen the replay yet, but I wasn't looking at the basket. I was looking down so I wouldn't have a hard fall.

"I was surprised it went in, but at the same time I'm glad it went in."

The win lifts the No. 5 seed Wildcats (29-7) into a regional semifinal matchup with top-seeded Duke on Thursday. It marks a triumphant return to the second weekend of play in the school's first trip back to the tournament after last season's absence ended its 25-year appearance streak.

"I can't tell you how excited we are to be moving on to the Sweet 16," second-year Arizona coach Sean Miller said. "It's one thing to be a part of this tournament, but when you have the experience of advancing, it's second-to-none as a college basketball program, players, coaches."

The win over the No. 4 seed Longhorns didn't come without its share of controversy. Texas (28-8) trailed by as many as 13 points in the first half before J'Covan Brown scored 21 of his 23 in the second to lead the Longhorns back into the game.

Brown was 13 of 13 on free throws, bringing his two-game tournament total to a perfect 25 of 25. His jumper in the lane with just over a minute remaining gave Texas a 69-67 lead, its first since it was up 12-11 early in the game.

East Regional

Ohio State 98, George Mason 66

At Cleveland, David Lighty made all seven of his 3-pointers and scored 25 points, Jared Sullinger added 18 after informing one of George Mason's players "it's over" and top-seeded Ohio State made 16 3s to advance in the NCAA tournament with a jaw-dropping rout.

With thousands of fans chanting "O-H-I-O" at every opportunity, the Buckeyes (34-2) took apart the eighth-seeded Patriots (27-7), who created some March mayhem a few years ago and hoped to follow Butler's lead by taking out a No. 1 seed in this tourney.

Ohio State destroyed any upset plans and moved closer to its first national title since 1960. The Buckeyes will meet Kentucky (27-8) in the East regional semifinals Friday in Newark. Ohio State is 5-0 in NCAA tournament matchups with the Wildcats.

After falling behind 11-2, the Big Ten champions used their devastating inside-outside attack to post the most lopsided tournament victory in school history.

William Buford scored 18 and freshman guard Aaron Craft had 15 assists for Ohio State.

Cam Long scored 16 points to lead George Mason, which played without Luke Hancock, one of its best players. The sophomore guard had food poisoning and remained with a trainer at the team's hotel.

Marquette 66, Syracuse 62

At Cleveland, Darius Johnson-Odom's 3-pointer with 27 seconds left snapped a tie and gave Marquette a win over Big East foe Syracuse that put the Golden Eagles into the round of 16 for the first time in eight years.

The 11th-seeded Golden Eagles (22-14) had the winning basket set up by one of Syracuse's 18 turnovers. Marquette will play North Carolina in the East regional semifinals Friday in Newark, N.J.

The Golden Eagles are in the round of 16 for the first time since Dwyane Wade led them to the Final Four in 2003.

This was the second straight early exit for third-seeded Syracuse (27-8). The Orange were a No. 1 seed last year and lost in the round of 16 to Butler.

Southwest Regional

Florida State 71, Notre Dame 57

At Chicago, Bernard James scored 14 points, Michael Snaer added 13 and Florida State showed there's more to its game than defense with a dominant upset of second-seeded Notre Dame that put the Seminoles in the round of 16 for the first time since 1993.

It was an impressive effort by the 10th-seeded Seminoles, who had four players in double figures and went 9 of 19 from 3-point range.

Florida State (23-10) now faces upstart Virginia Commonwealth in the Southwest regional semifinals Friday in San Antonio. According to STATS LLC, it will be the first 10 vs. 11 matchup in NCAA tournament history.

For Notre Dame, meanwhile, it was another disappointing showing in the NCAAs. The Fighting Irish (27-7) had their highest seed since 1981 under Digger Phelps, but they've reached the regional semifinals only once in the last 24 years (2003).

Big East player of the year Ben Hansbrough was stifled most of the night by the Seminoles' defense, scoring 18 points on 5-of-13 shooting before fouling out with 3:19 left.

Kansas 73, Illinois 59

At Tulsa, Okla., twin brothers Marcus and Markieff Morris combined for 41 points and 24 rebounds, powering top-seeded Kansas past Illinois to ensure the Jayhawks wouldn't make an opening-weekend exit from the NCAA tournament for the second straight year.

The Jayhawks (34-2) avoided revisiting their loss to another No. 9 seed, Northern Iowa, exactly a year earlier and also on Oklahoma soil. Instead, they're moving on in a bracket filled with upsets.

No. 11 seed VCU and 12th-seeded Richmond will join them in the Southwest regional semifinals in San Antonio. Kansas plays Richmond on Friday.