The second round of the U.S. Open Cup was tonight, so the matches for the third round are now set for next Tuesday, May 29 (home team listed first): Harrisburg (USL Pro) - New England Richmond (USL Pro) - D.C. United Charleston (USL Pro) - New York Columbus - Dayton (USL Pro) Philadelphia - Rochester (USL Pro) Michigan (PDL) - Chicago Kansas City - Orlando City (USL Pro) San Antonio (NASL) - Houston Dallas - Charlotte (USL Pro) Chivas - Ventura County (PDL) San Jose - Ft. Lauderdale (NASL) Portland - Cal FC (USASA) Carolina (NASL) - Los Angeles Tampa Bay (NASL) - Colorado Atlanta (NASL) - Seattle Minnesota (NASL) - Salt Lake Potential upsets abound - Minnesota is unbeaten in the NASL, San Antonio is up there in the standings, Tampa Bay is playing well, and with Colorado travelling a long way, there could be fatigue, Carolina is managed by Colin Clarke, and we saw what he did against the Galaxy with Puerto Rico. In the USL Pro, Orlando is continuing their great form from last season's title run, unbeaten in seven. Rochester has matched their record, both with 6 wins and a draw. Charleston is also always dangerous in this competition, and even though Hans Backe has said he'll play his starters, it's tough to see how that will play out. Also, with 9 MLS teams playing away from home on fields of always questionable quality, you never know what can happen. The fairytale match here, however, is Eric Wynalda's Cal FC against Portland at JELD-WEN Field. That's certainly one to keep an eye on. So here we go, MLS in the U.S. Open Cup, with a spot in the 2013-14 CONCACAF Champions League on the line.