CREATE TABLE table_73441 ("Conference" TEXT, "Regular Season Winner" TEXT, "Conference Player of the Year" TEXT, "Conference Tournament" TEXT, "Tournament Venue  ( City ) " TEXT, "Tournament Winner" TEXT)

What was the conference when Arizona State won the regular season?
SELECT "Conference" FROM table_73441 WHERE "Regular Season Winner" = 'Arizona State'
SELECT "Conference" FROM "table_73441" WHERE "Regular Season Winner" = 'Arizona State'