The Big Ten men's basketball conference tournament will expand to include all 18 member schools this upcoming season, per a report from the Big Ten Network. The Big Ten expanded from 14 to 18 teams last year after adding USC, UCLA, Washington and Oregon from the Pac-12. 18 seed, the No. 10-12 seeds will await the three Day 1 winners in the second round for the second day of the competition. 7 teams play winners from the previous day).