Connecticut's Kemba Walker celebrates his team's 74-67 NCAA regional semifinal victory over San Diego State Thursday, in Anaheim, Calif.

ANAHEIM, Calif. — Kemba Walker scored 22 of his 36 points in another dynamic second-half performance, and Connecticut moved to the brink of its fourth trip to the Final Four Thursday with a 74-67 win over San Diego State.

Freshman Jeremy Lamb added 24 points and hit a clutch 3-pointer with 1:43 left for the third-seeded Huskies (29-9).

D.J. Gay scored 16 points for the second-seeded Aztecs (34-3), who couldn’t quite catch up to Walker during a scintillating second-half stretch run.

Walker scored 12 consecutive points for UConn in that late duel with Gay, whose 3-pointer cut the Huskies’ lead to 65-64 with 2:53 left. Lamb replied with his 3 before an emphatic last-minute dunk.

Arizona 93, Duke 77

At Anaheim, Calif., Derrick Williams scored a career-high 32 points and his Wildcats teammates showed they’re not just a one-man team, upsetting the defending national champion Blue Devils to reach the final eight for the first time since 2005.

The top-seeded Duke (32-5) was sent packing from a regional semifinal for the second time in three years.

Williams scored 25 of his points in the first half before his teammates came up big in the final 20 minutes. Lamont Jones had 16 points and Solomon Hill 13.

Butler 61, Wisconsin 54

At New Orleans, Wisconsin’s normally suffocating defense could not slow Matt Howard and Butler’s run toward a second straight Final Four appearance. If anything, the Bulldogs may be gaining momentum.

After narrowly surviving its first two NCAA tournament games by margins of two points or less, Butler led by 20 points before holding on to beat the Badgers.

Howard had 20 points and 12 rebounds, Shelvin Mack scored 13 points and Shawn Vanzant 10 for the eighth-seeded Bulldogs (26-9).

Jordan Taylor scored 22 for Wisconsin (25-9), which shot 30.4 percent (17 of 56).

Florida 83, BYU 74

At New Orleans, Alex Tyus recorded 19 points and 17 rebounds to help the Gators chase Jimmer Fredette and the Cougars (32-5) out of the tournament.

While Fredette was the star attraction, scoring 32 points on 11 for 29 shooting in the final game of his college career, Florida countered with balance.

Kenny Boynton added 17 points while Erving Walker and Chandler Parsons both scored 16. Boynton and Parsons each hit 3-pointers in overtime as Florida (29-7) outscored BYU 15-6.