New York Red Bulls 3 Atlanta Silverbacks 0
The Red Bulls were eliminated in this round of last year's tournament by the New York Cosmos 3-0. They didn't mess around this year against Atlanta starting regulars Bradley Wright-Phillips, Sacha Kljestan, Lloyd Sam, Luis Robles and others and cruised to a 3-0 win of their own. Sam and Ronald Zubar each scored in the opening 15 minutes, but Sam left the match just over 20 minutes in with both groin and ankle injuries. Sean Davis added an insurance goal in the second half.
Philadelphia Union 0 Rochester Rhinos 0, Philadelphia Wins 3-1 in Shootout
After 120 minutes of scoreless action, the Union edged out the Rochester Rhinos 3-1 in a penalty kick shootout. Maurice Edu, Vincent Nogueira and Cristian Maidana each converted for the Union. John McCarthy played the full match in net for Philadelphia and was scored on just once in four tries during the shootout.
Sporting Kansas City 1 Saint Louis FC 0
Benny Feilhaber connected with Graham Zusi for the match's lone goal as Sporting knocked off Saint Louis FC 1-0. Tim Melia remains unbeaten in net for Sporting in seven starts across all competitions since taking over for Luis Marín. Perhaps more importantly though for Sporting, Chance Myers made his return to the field for the first time after tearing his achilles tendon a year ago. Myers went 55 minuets before coming off in favor of rookie Saad-Abdul Salaam.
FC Dallas 4 Oklahoma City Energy 1
David Texeira and Michael Barrios both netted a pair of goals as FC Dallas jumped out to a 3-0 first half lead and cruised to a 4-1 win over the Energy. Dallas reached the semifinals of last year's tournament before falling on penalties to the Philadelphia Union.
Chicago Fire 1 Louisville City FC 0 (a.e.t.)
Quincy Amarikwa broke a 0-0 tie in the 115th minute as the Fire snuck by Louisville City. Sean Johnson picked up the shutout in net for Chicago. Scottish international Shaun Maloney came off the bench for the Fire, but left in extra time after taking a knock.
Colorado Rapids 4 Colorado Springs Switchbacks 1
Rookies Dominique Badji and Joseph Greenspan each scored goals while Dillon Serna had two and an assist as the Rapids routed the Switchbacks 4-1. Greenspan was making his first appearance for Colorado while Badji had lost his starting spot and had been seeing only limited minutes in recent matches.
Real Salt Lake 2 Seattle Sounders FC 2 1
Real Salt Lake rallied from a 1-0 halftime deficit thanks to goals by Joao Plata and Javier Morales. Playing without regulars Kyle Beckerman, Nick Rimando, Jámison Olave or Tony Beltran and only getting five minutes from Álvaro Saborío, RSL got strong performances from its reserves and advanced to the 5th Round for the first time since 2013.
Portland Timbers 3 Seattle Sounders 1 (a.e.t.)
In last year's quarterfinals, Seattle knocked off Portland 3-1 in extra time behind goals from Kenny Cooper and Marco Pappa. The Timbers returned the favor this year though as Rodney Wallace and Maximiliano Urruti scored after regulation guaranteeing a new U.S. Open Cup Champion in 2015. Seattle fought valiantly despite going a man down in the 69th minute when Brad Evans picked up a second yellow card, eventually drawing even behind a goal from Obafemi Martins, but they couldn't conjure up enough magic to knock off their rivals. Matters were made that much more difficult when they were reduced to seven men in extra time following subsequent ejections of Michael Azira and Clint Dempsey, AND an injury to Martins who left the match on a stretcher. Diego Valeri also scored for the Timbers as he made his return from injury.
San Jose Earthquakes 2 Sacramento Republic 2, San Jose Wins 6-5 in Shootout
In a rematch of last year's 4th Round match-up won by the Quakes, Sacramento looked to be on their way to a revengeful upset only to surrender a pair of goals to Chris Wondolowski in a six-minute span to force overtime. Still, Sacramento had their chances in extra time, AND had a chance to win in PKs, but Bryan Meredith made a huge save at 3-3, the Quakes made their final 3 kicks to win the 8-round shootout, 6-5.