64-Team Open Bracket, 16-Team Pool Play, 12-Team Champ Bracket. Pool Play at the Arlington Major will feature 12 Auto-Qualified teams and 4 teams from the Open Bracket. - 4 Pools of 4, Single Round Robin, 1st/2nd in Pools go to Winners Round 1, 3rd in Pools go to Lower Round 1, 4th in Pools is eliminated.