SMU and Tulsa also won their first round games. With 3 wins in the first round and USF having a bye that puts 4 AAC teams in the final 32.
Initially at first glance, with a record of 13-2-4, I was surprised that SMU was not seeded in comparison to other seeded teams such as Ohio St (6 losses), USF (5 losses), Syracuse (5 losses); but, SMU thinks its in the XII of soccer as their non-conference schedule is lacking with wins against Sac St, Ill-Chicago and Houston Baptist matched-up against losses to BC, Stanford, and ties to Harvard and Portland.
Tulsa, with a so-so record of 8-6-6 does have non-conference games against St. Louis (loss), UVA (tie), UNC (loss), Portland (win), Creighton (loss), which is actually a tough schedule for anyone. not sure if they would have gotten in if they had not won the American championship; but, they tried.
USF has a decent non-conference schedule, too, with games against G-Town (win), ND (loss), Indiana (loss), Denver (loss)