Time: 4:30 p.m. EDT
Venue: CenturyLink Field, Seattle, Wash.
TV: NBC Sports Network (Arlo White and Kyle Martino)
Although Seattle will be without starting goalkeeper Michael Gspurning, their offense will pack more than enough firepower to give the Union plenty of work. Expect whoever starts at left back to be in for a long afternoon, and expect the Sounders to exploit the flanks just as San Jose did last weekend.
Seattle Sounders (4-4-2)
Goalkeeper: Bryan Meredith
Defenders: Marc Burch, Patrick Ianni, Jeff Parke, Adam Johansson
Midfielders: Alex Caskey, Osvaldo Alonso, Andy Rose, Mauro Rosales
Forwards: Fredy Montero, David Estrada
Bench: GK Andrew Weber; Ds Leo Gonzalez, Zach Scott; Ms Servando Carrasco; Fs Cordell Cato, Eddie Johnson, Sammy Ochoa
Philadelphia Union (4-4-1-1)
Goalkeeper: Zac MacMath
Defenders: Raymon Gaddis, Danny Califf, Carlos Valdés, Sheanon Williams
Midfielders: Keon Daniel, Gabriel Gomez, Michael Farfan, Freddy Adu
Forwards: Kai Herdling Lionard Pajoy
Bench: GK Chase Harrison; D Porfirio Lopez; Ms Brian Carroll, Amobi Okugo; Fs Cristhian Hernandez, Josué Martinez, Danny Mwanga
If you're on a mobile device, click here for live game updates.