Pacific-12 Conference Men's Basketball Tournament

Pac-12 Conference Men's Basketball Tournament
Logo of the tournament
Sport	Basketball
Conference	Pac-12 Conference
Number of teams	12
Format	Single-elimination tournament
Current stadium	T-Mobile Arena
Current location	Paradise, Nevada
Played	1987–1990, 2002–present
Last contest	2016
Current champion	Oregon Ducks
Most championships	Arizona Wildcats (5)
TV partner(s)	Pac-12 Networks, Fox Sports and ESPN (2013-2024)
Official website	Pac-12.org Men's Basketball
Sponsors
New York Life
Host stadiums
Pauley Pavilion 1987 McKale Center 1988 The Forum 1989 University Activity Center 1990 Staples Center 2002–2012 MGM Grand Garden Arena 2013–2016 T-Mobile Arena 2017–2019
Host locations
Los Angeles 1987, 2002–2012 Tucson, Arizona 1988 Inglewood, California 1989 Tempe, Arizona 1990 Las Vegas 2013–present

The Pac-12 Conference Men's Basketball Tournament, otherwise known as the Pac-12 Tournament, is the annual concluding tournament for the NCAA college basketball in the Pac-12, taking place in Las Vegas at the T-Mobile Arena.

The predecessor conference of the Pac-12, the Pacific Coast Conference, began playing basketball in the 1915–16 season. The PCC was split into North and South Divisions for basketball beginning with the 1922–23 season. The winners of the two divisions would play a best of three series of games to determine the PCC basketball champion. If two division teams tied, they would have a one-game playoff to produce the division representative. Starting with the first NCAA Men's Basketball Championship in 1939, the winner of the PCC divisional playoff was given the automatic berth in the NCAA tournament. Oregon, the 1939 PCC champion, won the championship game in the 1939 NCAA Men's Division I Basketball Tournament.

The last divisional playoff was in the 1954–55 season. After that, there was no divisional play and all teams played each other in a round robin competition. From the 1955–56 season through the 1985–86 season, the regular season conference champion was awarded the NCAA tournament berth from the PCC, later AAWU, Pac-8 and Pac-10.

Beginning with the 1975 NCAA Men's Division I Basketball Tournament, the league (known as the Pac-8 until becoming the Pac-10 with the 1978 arrival of Arizona and Arizona State) would usually place at least one other at-large team in the tournament. Following the end of UCLA's dominance in the 1970s, the Pac-10 would struggle to get out of the early rounds of the NCAA tournament.

By the 1985–86 season, the Pac-10 was one of three remaining conferences that gave their automatic NCAA tournament bid to the regular season round-robin champion. The other two conferences were the Ivy League and the Big Ten Conference.

The modern tournament format began in 1987. The first incarnation of the tournament ran from 1987 to 1990, hosted at different school sites. UCLA was awarded the inaugural tournament, which was won by the Bruins. The Arizona Wildcats would take the next three. It was dropped after 1990 upon opposition from coaches, poor revenue, and poor attendance. The Pac-10 went back to having the regular season conference champion get awarded the automatic NCAA tournament bid for the 1990–2001 seasons. During that time Arizona and UCLA both won NCAA championships.