The PDL winners: 2016 champion Michigan Bucks, Reading United and Chicago FC United. Two other amateur teams, the Eric Wynalda's L.A. Wolves and GPS Omens from Massachusetts, advanced after defeating local amateur rivals.
May 17 in Reading, Pa.
Reading United 3 New York Cosmos 2. Goals: Marie 39, Micaletto, Pierrot 45; Alhassan 12, Szetela 64.
Reading United -- Beaury, R.Campbell, Chanis, W.Campbell, Finnegan, Delhommelle, Micaletto (Fox 86), Adams, Pieters, Pierrot (Bennett 68), Marie (Zandi 76).
New York Cosmos -- Maurer, Barnes, Mendes (Jakovic 46), Ochieng (Ayoze 46), Mulligan, Calvillo, Alhassan, Marquez, Szetela, Herrera (Flores 62), Restrepo.
Reading United stunned the Cosmos with three goals in six minutes at the end of the first half to reverse a 1-0 deficit, and it held on for a 3-2 win Albright College's Shirk Stadium.
Frenchmen Paul Marie (FIU) and Hugo Delhommelle (Lander) and Haitian-born Frantzdy Pierrot (College of Charleston) scored for Reading United, which has a long history as a PDL feeder to the pros.
Kalif Alhassan, who scored his first goal for the club to give the Cosmos a short-lived lead in the first half, set up Danny Szetela for the second goal to cut the deficit to 3-2 in the in the 63rd minute.
Reading United, which held on despite losing English midfielder Mohammed Adams (Syracuse) to a red card in stoppage time, will face the Harrisburg City Islanders in the third round. The only other time it made the third round in its nine straight appearances was in 2013 when it fell to the New York Red Bulls.
May 17 in Pontiac, Mich.
Michigan Bucks 1 Indy Eleven 0. Goal: Atuahene 35.
Michigan Bucks -- Sheperd; Souahy, Kaba, Mukuna, Timmer; Snell, Dunwell, Owens, Stoneman (Cerda 46); Atuahene, Landell (Collier 66).
Indy Eleven -- Cardona; Vukovic, Manning, Watson-Siriboe, Palmer; Keller (Speas 46), Ring, Thompson, Plumhoff (Franco 61); Braun, Goldsmith.
Ghanaian forward Francis Atuahene (Michigan) scored the lone goal as the reigning PDL champion Michigan Bucks defeated the NASL's Indy Eleven, 1-0.
The Bucks had a chance to extend their lead late in the game but Elliot Collier has his shot saved by Indy keeper Keith Cardona and Ivo Cerda had his rebound cleared off the line by Kwame Watson-Siriboe.
May 17 in Richmond, Va.
Richmond Kickers 0 Christos FC 1. Goal: Caltabiano 79.
Richmond Kickers -- DeBellis, Shanosky, A.Lee, Troyer, Wyatt, Yomby (E.Lee 83), Jane (Bolduc 80), Minutillo, Eskay, Grant, Minatel (Owusu Sekyere 80).
Christos FC -- Saunders, Glos, Kansaye, Albrecht, Fisher, Baxter (Graham 73), Houapeu, Forbess, Pereira, Joe (Caltabiano 76), Caringi.
Geaton Caltabiano's goal scored in the 79th minute gave longtime Maryland amateur powerhouse Christos FC a 1-0 win over the Richmond Kickers, who won the Open Cup in 1995, the last year before MLS clubs entered the tournament.
Richmond coach Leigh Cowlishaw made eight changes in the team that had tied the Harrisburg City Islanders, 0-0, in USL action on Saturday. The Kickers have won just twice in eight USL games and have scored only four goals, ranking 28th out of 30 teams.
May 17 in Evanston, Ill.
Chicago FC United 3 Pittsburgh Riverhounds 1. Goals: Segbres 19, Barlow 73, Sierakowski 90+l; Banjo 52.
Pittsburgh Riverhounds -- Broome, Fitzpatrick, Jack, Thompson, Campbell (Washington 71), Parkes, Green, Howell (Kerr 38), Earls, Walsh (Hertzog 46), Banjo.
Chicago FC United -- Jackman, Gonzalez, Samake, De Bruijne, Sanchez, Moore, Perez, Garcia (Barlow 70; Farina 75), Segbres, Sierakowski, Catalano.
Mark Segbres scored the first goal and set up Wisconsin teammate Tom Barlow for the winner as the PDL's Chicago FC United defeated the USL's Pittsburgh Riverhounds, 3-1, at Northwestern's Martin Stadium. Ryan Sierakowski (Michigan State) added an insurance goal in stoppage time.
Chicago FC United, which is playing in its first Open Cup, will face Christos FC in the third round, assuring one of them to get to face an MLS opponent in the fourth round. The loss marked the second straight season the Hounds exited after their first game.
-- GPS Omens, which plays in the Bay State Soccer League, beat the NPSL's Boston City FC, 2-1, in a battle of Massachusetts amateur teams on goals by Keith Caldwell, brother of New England Revolution midfielder Scott Caldwell, and Charles Romero.
-- Former LA Galaxy and Chivas forward Paolo Cardozo scored on a penalty kick in the 111th minute to give the L.A. Wolves a 1-0 win over Chula Vista FC in a battle of Southern California amateur teams.