Here are the referee assignments for this weekend's MLS action, per Professional Referee Organization (PRO).
Toronto FC vs. New England Revolution
BMO Field (7:00pm ET)
REFEREE: FOTIS BAZAKOS
ASST 1: Phil Briere
ASST 2: Scott Kachmarik
4TH: Ted Unkel
Real Salt Lake vs. Portland Timbers
Rio Tinto Stadium (10:00pm ET)
REFEREE: BALDOMERO TOLEDO
ASST 1: Corey E Rockwell
ASST 2: CJ Morgante
4TH: Robert Sibiga
08/31/2013
Columbus Crew vs. Seattle Sounders
Columbus Crew Stadium (7:30pm ET)
REFEREE: ISMAIL ELFATH
ASST 1: Chris Strickland
ASST 2: Brian Dunn
4TH: Hilario Grajeda
Philadelphia Union vs. Montreal Impact
PPL Park (7:30pm ET)
REFEREE: EDVIN JURISEVIC
ASST 1: Adam Wienckowski
ASST 2: Kevin Klinger
4TH: Sorin Stoica
New York Red Bulls vs. D.C. United
Red Bull Arena (8:00pm ET)
REFEREE: JUAN GUZMAN
ASST 1: Gregory Barkey
ASST 2: Paul Scott
4TH: Mark Geiger
Sporting Kansas City vs. Colorado Rapids
Sporting Park (8:30pm ET)
REFEREE: SILVIU PETRESCU
ASST 1: Joe Fletcher
ASST 2: Jason Cullum
4TH: Armando Villarreal
LA Galaxy vs. San Jose Earthquakes
StubHub Center (10:30pm ET)
REFEREE: KEVIN STOTT
ASST 1: Mike Rottersman
ASST 2: Brian Poeschel
4TH: Daniel Radford
09/01/2013
Chicago Fire vs. Houston Dynamo
Toyota Park (3:00PM ET)
REFEREE: DREW FISCHER
ASST 1: Craig Lowry
ASST 2: Mike Kampmeinert
4TH: Younes Marrakchi
Vancouver Whitecaps vs. Chivas USA
BC Place (7:00PM ET)
REFEREE: DAVE GANTAR
ASST 1: Eric Proctor
ASST 2: Jeremy Hanson
4TH: Allen Chapman