It’s the nature of the NCAA tournament beast. Of the 11 Big East Conference teams that made the tournament field, two remain (Connecticut and Marquette). That’s the same number of Mountain West Conference teams still competing in the round of 16 (BYU and San Diego State). The field has already lost a No. 1 seed (Pittsburgh), and sees four teams from the bottom half of the seeding still breathing (No. 12 Richmond, two No. 11 seeds: Virginia Commonwealth and Marquette, and No. 10 Florida State). Oh, and Butler’s back. Here’s our rundown of Thursday's Sweet 16 matchups. YOUR PICKS: Who do you have moving into the Elite Eight?