SAN DIEGO -- Malachi Flynn sat slumped in his chair and glared straight ahead, the sting of San Diego State's first loss of the season still painfully fresh.
"We lost. It was the first time it happened, so it doesn't feel good," Flynn said moments after the fired-up UNLV Rebels beat SDSU 66-63 on Saturday night, snapping the Aztecs' 26-game winning streak and ending their run as the nation's only undefeated team.
"Well, we tasted defeat for the first time, and it doesn't taste very good," SDSU coach Brian Dutcher said. "Anybody that was saying they thought a loss would be good for the Aztecs, we don't feel that way at all. We're vastly disappointed. We wanted a perfect season, but it didn't happen, and that's college basketball."
Elijah Mitrou-Long scored 19 points, including two free throws with 11.5 seconds left for UNLV.
SDSU erased almost all of a 14-point deficit when it pulled to 64-63 on Flynn's 3-pointer with 14.5 seconds left. Mitrou-Long was fouled by Matt Mitchell with 11.5 seconds left and made both free throws.
Flynn missed a contested 3-pointer with 3.3 seconds left and the ball went to the Rebels. After a long pass down the court, Mitchell ended up with the ball, and his desperation shot at the buzzer fell short.
SDSU (26-1, 15-1 Mountain West) unveiled the regular-season conference banner before the game and then looked nothing like the team that raced to the best start in school history. The Aztecs trailed by 14 midway through the second half and were down 11 with 4:32 to go.
They were uncharacteristically porous on defense and sloppy on offense, missing easy shots and committing careless turnovers.
SDSU had been projected as the No. 1 seed in the East in the NCAA Tournament. Providing the Aztecs don't stumble again, they could stay in that position, or maybe drop to the No. 2 seed in the West. Gonzaga is the projected No. 1 seed in the West, where the regionals will be at Staples Center in Los Angeles, just up the freeway.
Dutcher said his postgame message to the team was "disappointment, but it's college basketball."
"It happens every night, and it hadn't happened to us all year," Dutcher said. "So now we'll see how we respond to it. And I said all year, even though we hadn't lost a game, I felt if we did, this team is built the right way. They're connected, their chemistry is great, and if there was a team able to handle defeat, this one is probably as good as any.''
Flynn scored 24, Mitchell 13 and Jordan Schakel 10 for SDSU.
As the Rebels ran off Steve Fisher Court after the game, some players pointed at and jawed with the SDSU student section.
UNLV was bothered by SDSU's pregame banner-raising.
"They've had a historic year," Rebels coach T.J. Otzelberger said. "Is there a chance it got talked about in our locker room before the game? Certainly. But I seem to forget what they said.
"It's a really great win for our program. It's a culmination of the hard work we've been putting in. I credit our guys for being so focused. I'm really proud of our guys."
Mitrou-Long said UNLV "took it in a disrespectful way, but they can do whatever they want. It's their home court. We focused on just winning."
Hardy offered his take.
"I feel like tonight we played a full 40 minutes," he said. "We stuck to the game plan and played for each other. Credit to them. They were 26-0, and now they're 26-1. We had business to take care of, and we came here and did it."
SDSU pulled to 62-60 with 25.6 seconds left after Flynn's two free throws and Aguek Arop's layup. Mitrou-Long then made two free throws with 19.9 seconds left for a four-point lead.
Hardy's jumper gave UNLV a 44-30 lead three minutes into the second half, before SDSU pulled within seven, thanks to Flynn's layup and Schakel's 3-pointer. But Hardy then made a jumper from the free throw line and a layup to put the Rebels back up by double digits.
UNLV took advantage of numerous SDSU breakdowns to take a double-digit lead midway through the first half and pushed it to 37-25 at halftime on a steal and slam dunk by Mitrou-Long.
SDSU had the lead just once, at 14-13 after Flynn's 3-pointer, then allowed UNLV to go on a 10-0 run. Mitrou-Long started it by converting a 4-point play when he hit a 3-pointer and was fouled by Flynn. Cheikh Mbacke Diong scored inside, then Hardy hit a floater and Mitrou-Long made a layup.
SDSU's only points in a four-minute span were two free throws apiece by Mitchell and Flynn. UNLV kept connecting, though, getting a bank shot by Hamilton and a 3-pointer by Mitrou-Long to take its first double-digit lead 28-18 with 7:12 before halftime.
The Aztecs will drop from their No. 4 spot in the Top 25, which matched the highest ranking in school history.
UNLV: The Rebels lost at home to SDSU by just four points on Jan. 26. They came out strong on the road and let SDSU have the lead just once in the first half, at 14-13 after Flynn's 3-pointer.
SDSU: Mitchell was recognized before the game for reaching the 1,000-point plateau, which he accomplished in the previous home game, on Feb. 11 against New Mexico.
UNLV hosts Boise State in its home finale on Wednesday night. SDSU hosts Colorado State in its home finale on Tuesday night.