The 2017 Lamar Hunt U.S. Open Cup tournament proper will feature teams from all five tiers of men's soccer of the American Soccer Pyramid. A record 64 amateur teams have entered qualifying this year. As with the 2016 tournament, US Soccer now oversees the qualifying process that used to be handled by each association. According to US Soccer, all teams within the Division I & II professional leagues will qualify automatically as in past years. Any Open Division national league can apply to use previous year's league standings as their qualification method. Remaining Open Division teams will participate in up to five qualifying rounds to determine entrants into the tournament proper. Final slot allocation will be determined when team registration has concluded.