FRISCO, TX - MARCH 17: Rodney Wallace #22 of the Portland Timbers moves the ball against Ricardo Villar #11 of the FC Dallas during the MLS match at FC Dallas Stadium on March 17, 2012 in Frisco, Texas.

Seattle Sounders' Roger Levesque, center, pushes aside Toronto FC's Ryan Johnson, second from right, as Sounders' Brad Evans watches at right, in the second half of an MLS soccer match, Saturday, March 17, 2012, in Seattle. The Sounders won 3-1.

Seattle Sounders' David Estrada (16) celebrates with Sounders' Fredy Montero, right, and Brad Evans, center, after Estrada kicked a goal against Toronto FC in the first half of an MLS soccer match, Saturday, March 17, 2012, in Seattle.

Real Salt Lake defender Tony Beltran, left, tackles New York Red Bulls midfielder Joel Lindpere (20) during the second half of an MLS soccer match Saturday, March 17, 2012, in Salt Lake City. Real Salt Lake won 2-0.

Real Salt Lake forward Paulo Junior, left, is taken down by New York Red Bulls goalkeeper Ryan Meara during the first half of an MLS soccer match Saturday, March 17, 2012, in Salt Lake City.

Mar 17, 2012; Kansas City, KS, USA; New England Revolution midfielder Benny Feilhaber (22) pushes Sporting KC midfielder Roger Espinoza (15) in the first half at Livestrong Sporting Park.

Mar 17, 2012; Kansas City, KS, USA; New England Revolution goal keeper Matt Reis (1) makes a save against Sporting KC forward C.J. Sapong (17) in the second half at Livestrong Sporting Park. Kansas City won the game 3-0.

Houston Dynamo's Jermaine Taylor, left, and San Jose Earthquakes' Shea Salinas fight for the ball during the first half of an MLS soccer match on Saturday, March 17, 2012, in San Francisco.

San Jose Earthquakes' Shea Salinas, left, and Houston Dynamo Je-Vaughan Watson fight for the ball during the first half of an MLS soccer game Saturday, March 17, 2012, in San Francisco.

Montreal Impact's Lamar Neagle, right, goes up for the ball with Chicago Fire's Dan Gargan during the second half of an MLS soccer match in Montreal, Saturday, March 17, 2012.

Montreal Impact's Sanna Nyassi flips over as Chicago Fire's Hunter Jumper takes the ball during the second half of an MLS soccer match in Montreal, Saturday, March 17, 2012.