No. 1 Arizona (38-17)
• Location: Tucson
• Conference finish: Won a share of the Pac-12 regular season championship with an 8-7, walk-off victory against Arizona State on Sunday.
• Player to watch: Ace Kurt Heyer is 11-2 with a 2.03 ERA this season.
• In the pros: The UA has produced 69 major leaguers, including San Diego Padres catcher Nick Hundley and Cleveland Indians outfielder and Tucson native Shelley Duncan.
No. 2 New Mexico State (35-22)
• Location: Las Cruces, N.M.
• Conference finish: Louisiana Tech eliminated the top-seeded Aggies from the Western Athletic Conference tournament Friday.
• Player to watch: Junior Zac Fisher leads the WAC with a .363 batting average and 81 hits, and is tied for sixth with 33 walks.
• In the pros: NMSU has produced two big-leaguers. Pitcher Mark Acre made 114 appearances for Oakland from 1994-97.
No. 3 Louisville (39-20)
• Location: Louisville, Ky.
• Conference finish: Was eliminated from the Big East tournament by South Florida on Friday.
• Player to watch: Right-hander Justin Amlung is 8-4 with a team-best 2.36 ERA.
• In the pros: Four big-leaguers, including former Seattle Mariners reliever Sean Green, started their careers at Louisville.
No. 4 Missouri (32-26)
• Location: Columbia, Mo.
• Conference finish: Beat Oklahoma on Sunday to win its first Big 12 title. The Tigers move to the SEC next season.
• Player to watch: Right fielder Dane Opel leads the Tigers in home runs (11), RBIs (45) and slugging (.544).
• In the pros: Mizzou has produced 37 big-leaguers, including Texas Rangers second baseman and Tucson native Ian Kinsler - he transferred there from ASU - and Detroit Tigers pitcher Max Scherzer.
SCHEDULE at Hi Corbett
Game 1: No. 3 Louisville vs. No. 2 New Mexico State, 4 p.m.
Game 2: No. 4 Missouri vs. No. 1 Arizona, 8 p.m.
Game 3: Loser Game 1 vs. Loser Game 2, 4 p.m.
Game 4: Winner Game 1 vs. Winner Game 2, 8 p.m.
Sunday (online at ESPN3.com)
Game 5: Winner Game 3 vs. Loser Game 4, 4 p.m.
Game 6: Winner Game 4 vs. Loser Game 5, 8 p.m.
Game 7: (if necessary) Winner Game 6 vs. Loser Game 6, 8 p.m.
• Tickets: www.arizonawildcats.com