"I just try to come up big on big stages," Carson said. "I know my teammates look a lot for me to create for them and create for myself, and I try to go out there and make big plays."
Meeting for the second time this season, the Cardinal and Sun Devils traded 3-pointers, dunks and small runs in an entertaining opener to the four-day tournament at the MGM Grand Garden Arena.
Arizona State (21-11), the tournament's ninth seed, went up six with about 2 minutes left in regulation, but Stanford (18-14) rallied, tying it at 79 on Aaron Bright's four-point play with 38 seconds left.
Carson, who missed a 3-pointer at the end of regulation, put Arizona State up three with a layup in overtime, and Evan Gordon hit 5 of 6 free throws to send the Sun Devils to the quarterfinals Thursday against No. 21 UCLA.
Colorado 74, Oregon State 68 • Colorado won four games in four days to become a surprise winner of last year's Pac-12 Tournament.
The Buffaloes took the first step toward another four-in-four run on Wednesday.
Spencer Dinwiddie scored 20 points and Colorado picked up a much-needed win at the Pac-12 tournament, holding off Oregon State 74-68 in the first of what it hopes to be four rounds.
"You can't come in with the big-picture mentality," Colorado coach Tad Boyle said.
• Arizona State 89,Stanford 88 (OT)
• Colorado 74, Oregon State 68
• Utah 69, USC 66
• Washington 64, Washington St. 62