TEMPE, Ariz. -- Noah Fifita and Arizona's revamped defense produced the perfect capper to a turnaround season.
Fifita threw for 286 yards and a touchdown, Arizona's defense forced five turnovers and the Wildcats spoiled rival Arizona State's Big 12 championship game hopes with a dominating 23-7 win on Friday night.
"I'm so proud of this Arizona football team," Arizona coach Brent Brennan said. "Nobody thought they could. Check us out now."
The reigning Big 12 champion Sun Devils (8-4, 6-3 Big 12, No. 20 CFP) entered the most anticipated Territorial Cup game in a decade with a slim chance of reaching the title game again.
Arizona (9-3, 6-3, No. 25 CFP) squeezed the life out of their chances with a suffocating defense that filled up their turnover sword and limited Arizona State to 214 total yards.
Arizona's Michael Salgado-Medina made two of his three field goal attempts in the second half after missing two kicks and having another blocked. Kedrick Reescano scored on a 1-yard touchdown run with 1:56 left and Dalton Johnson capped Arizona's fifth straight win with an interception near midfield.
Not bad for a team that finished 4-8 in Brennan's first season.
"We always talk about starting fast, but you've also got to finish strong," Johnson said. "We did a great job of that."
Sun Devils' quarterback Jeff Sims, making his fourth start for injured Sam Leavitt, threw three interceptions and lost two fumbles. His botched handoff at Arizona State's 6 to open the third quarter set up Fifita's 9-yard touchdown pass to Cam Barmore that kicked off a run of 20 straight points by Arizona.
Sims finished with 114 yards on 11-of-25 passing.
"Jeff is 3-1 as a full-time starter," Arizona State coach Kenny Dillingham said. "I feel for him tonight, I really do. I just have so much respect and love. He's such a good human being."
Arizona State won last season's game 49-7 in Tucson, but Arizona has taken a huge step forward defensively in Brennan's second season, ranking in the top 25 nationally in numerous categories after being near the bottom last season.
The Wildcats clamped down on the Sun Devils from the start, holding them to 15 yards in the first quarter. Arizona State found some success on the ground on a 90-yard drive capped by Sims' 27-yard run, but its only other sustained first-half drive ended when Jesus Gomez's 49-yard field goal attempt clanked off the right post.
"The challenge was us -- we just had to get out of our own way," Arizona State tight end Chamon Metayer said. "By the time we figured it out, it was too late."
The Wildcats spent most of the first half stumbling in Arizona State's end of the field.
Quincy Craig lost a fumble at the Sun Devils' 8, Salgado-Medina missed a 42-yard field goal attempt and had another from the same distance blocked. Arizona also failed to take advantage of Michael Dansby's interception to the ASU 37, punting after failing to gain a yard on three plays.
Salgado-Medina kicked a 37-yard field goal in the closing seconds to cap a quick-hitting drive, making it 7-3 at halftime.
"I believe in Michael," Brennan said. "We'll get that worked out for the next one."
The Wildcats will certainly savor this one.