Saturday, April 15 (7:00 p.m.) Colorado Rapids at Tampa Bay Mutiny (FOX Rocky Mountain) Season series: Colorado leads 1-0 (Rapids lead 1-0 in aggregate goals). All-time regular season series: Series tied 6-6. Key players out: Colorado: M Ross Paule (knee strain-IR), F Henry Zambrano (hamstring strain), GK Adin Brown (U.S. Olympic Team), M Joey DiGiamarino (U.S. Olympic Team); Tampa Bay: F Raul Diaz Arce (World Cup qualifying), D Chad McCarty (U.S. Olympic Team). Referee: Tim Weyland; Referee’s Assistants: Sharon Wheeler, Ted Covaciu Saturday, April 15 (7:30 p.m.). Columbus Crew at MetroStars (MSG). Season series: First meeting. All-time regular season series: Columbus leads 9-7 (The Crew holds a 25-24 edge in aggregate goals). Key players out: Columbus: D Todd Yeagley (athletic hernia), M Ansil Elcock (World Cup qualifying), M Brian Maisonneuve (ankle surgery); MetroStars: Thomas Dooley (strained hamstring), D Ramiro Corrales (U.S. Olympic Team), GK Tim Howard (U.S. Olympic Team), M Tab Ramos is questionable along with D Mark Semioli (both nursing calf injuries). Referee: Paul Tamberino. Saturday, April 15 (7:30 p.m.). D.C. United at New England Revolution (HTS, FOX New England). Season series: First Meeting. All-time regular season series: United leads 11-5 (D.C. leads 26-20 in aggregate goals). Key players out: United: D Clint Peay (knee surgery), M Carey Talley (foot contusion), M Ben Olsen (U.S. Olympic Team), F Chris Albright (U.S. Olympic Team), D Eric Denton (U.S. Olympic Team); New England: D Brian Dunseth (U.S. Olympic Team), M Carlos Parra (U.S. Olympic Team). Referee: Ali Saheli; Referee’s Assistants: Roger Itaya, George Vergara Saturday, April 15 (8:00 p.m.). Miami Fusion at Chicago Fire (FOX Sports Chicago) Season series: First Meeting. All-time regular season series: Chicago leads 3-1 (The Fire lead 10-4 in aggregate goals). Key players out: Miami: D Jay Heaps (cervical strain); Chicago: D Andrew Lewis (red card suspension), F Josh Wolff (U.S. Olympic Team), F DaMarcus Beasley (U.S. Olympic Team). Referee: Brian Hall; Referee’s Assistants: Scott Weyland, Francisco Sanchez. Saturday, April 15 (8:30 p.m.). San Jose Earthquakes at Kansas City Wizards (FOX Sports Bay Area). Season series: First Meeting. All-time regular season series: San Jose leads 9-7 (The e-Quakes hold a slim 25-24 advantage in aggregate goals). Key players out: San Jose: F Ronald Cerritos (World Cup qualifying), D Jimmy Conrad (red-card suspension), M Wade Barrett (athletic hernia-IR), M Mauricio Solis (foot fracture-IR); Kansas City: F Chris Brown (U.S. Olympic Team). Referee: Reggie Rutty; Referee’s Assistants: Richard Huber, George Gansner. Saturday, April 15 (10:30 p.m.). Dallas Burn at Los Angeles Galaxy (KSTR Channel 49). Season series: First Meeting. All-time regular season series: Los Angeles leads 10-6 (The Galaxy own a 37-23 advantage in aggregate goals). Key players out: Dallas: G Mark Dodd (hand surgery-IR), M Brian Haynes (knee surgery-IR); Los Angeles: D Ezra Hendrickson (St. Vincente National Team), M Simon Elliott (personal commitment-sister’s marriage in New Zealand), D Dan Califf (U.S. Olympic Team), M Peter Vagenas (U.S. Olympic Team), M Sasha Victorine (U.S. Olympic Team). Referee: Richard Heron; Referee’s Assistants: Richard Eddy, Alex del Angel. Note: U.S. Olympians are training in Florida for Olympic qualifying that begins April 21. MLS cluubs were hoping to have released some or all of their players for this weekend’s games.