Twelve national championships, 22 Final Fours, and since the formation of the Pac-10 23 regular-season conference titles between them.

West of the Rockies, there’s no better basketball rivalry than UCLA and Arizona.

“I think it’s (like) Duke and North Carolina, though those schools are obviously much closer together,” Wildcats coach Sean Miller said on a Pac-12 teleconference this week. “It’s like Syracuse and Georgetown when you had John Thompson and Jim Boeheim, like Florida and Kentucky with Billy Donovan and John Calipari.

“For UCLA and Arizona I would put it in the same context.”

As in those rivalries, there’s been enough drama to fill the 500 miles separating the two campuses. Here’s a look at the 10 most memorable moments.

“He touched the ball!” Sean Miller spat out that phrase about six times following his team’s loss in the Pac-12 Tournament semifinals in Las Vegas. Livid, he insisted that Mark Lyons’ double-dribble foul was a missed call — that UCLA’s Jordan Adams had touched it.

He argued as such during the game, incurring his first technical of the season and gifting the Bruins with two points. The coach said all he told the official was, “He touched the ball!”

CBS Sports later reported that Pac-12 head of officials Ed Rush had offered, perhaps jokingly, $5,000 and a trip to Cancun to anyone who targeted Miller. Rush later resigned.

Chris Mills forces overtime with a buzzer-beating jumper, and No. 5 Arizona goes on to beat 14th-ranked UCLA at Pauley Pavilion. It was somewhat of a redemption game for Mills, a Los Angeles native who had transferred to the Wildcats on the heels of a recruiting scandal at Kentucky.

That season, the Wildcats won their fourth straight Pac-12 title and reached their third Sweet Sixteen in as much time.

Salim Stoudamire hits game-winning 3-pointer to lift No. 17 Arizona past UCLA at home. The Wildcats won after trailing for most of the game. The bulk of the comeback could be credited to Stoudamire, who had 24 of his 32 points in the second half. The 6-foot-1 guard eventually earned consensus second-team All-America honors.

Ed O’Bannon scored a career-high 31 points, and the No. 6 Bruins swept the 12th-ranked Wildcats for the first time since the 1991-92 season. It was the second-smallest margin of victory for the Bruins through their 19-game win streak en route to their 11th NCAA title.

The game that topped this? Tyus Edney’s mad dash in the NCAA Tournament against Missouri.

Fourth-ranked UCLA escaped Tucson as Jerryd Bayless’ potential tying shot fell short, winning a seventh straight against the Wildcats and cementing its spot as the conference power.

Freshman center Kevin Love had 24 points and 15 rebounds, his 18th double-double of the season. He scored 18 after halftime, including seven straight for a 65-61 lead with 3:18 left to go.

The Bruins ended the season in the last of their three straight Final Fours.

After spending a week on crutches with a sprained ankle, Dan Gadzuric had a career-high 22 points and 17 rebounds in an overtime upset of No. 8 Arizona. Doubtful to play, he was on the court for 41 of 45 minutes for the 24th-ranked Bruins.

“I’m speechless, really,” teammate Matt Barnes told the Associated Press afterward.

Wildcats guard Gilbert Arenas also scored a career-high 30 points, 25 of which came after halftime.

Seeded eighth in the Pac-10 Tournament, UCLA upset No. 1 Arizona in first round. Ray Young forced overtime with a 3-pointer, and Jason Kapono led the team with 26 points. This was the Bruins’ last win over the nation’s top-ranked team.

UCLA subsequently ended the season at 10-19, and coach Steve Lavin was fired.

Hardly a nail-biter, but this game saw Sean Elliott break Lew Alcindor’s career Pac-10 scoring record. Arizona’s All-American surpassed the former UCLA star with 35 points, reaching a total of 2,326.

The 38-point win remains the Wildcats’ largest margin of victory in the series, and was at the time the Bruins’ worst all-time loss to any opponent.