4th round now in the books. The only MLS club knocked out by a lower level team are the New York Red Bulls who lost 3-1 to the Harrisburg City Islanders (USL Pro). Amateur side Cal FC ran into a brick wall called the Seattle Sounders who pounded them 5-0
QF set for June 26 as follows:
Harrisburg City Islanders (USL Pro) vs Philadelphia Union
Dayton Dutch Lions (USL Pro) vs Sporting Kansas City
Charlotte Eagles (USL Pro) Vs Chivas USA
San Jose Earthquakes vs Seattle Sounders
so 5 MLS sides and 3 USL Pro sides left.