TAMPA, Fla. (AP) -- Steve Trittschuh and Mamadou Diallo scored late goals as the Tampa Bay Mutiny beat the undermanned Los Angeles Galaxy 2-0 on Saturday night.

Carlos Valderrama set an MLS record with his 20th assist of the season on Diallo's league-leading 18th goal in the 87th minute. Trittschuh opened the scoring in the 81st minute.

Los Angeles (10-7-7) played without six starters because of national team commitments. The absent players included Cobi Jones, Luis Hernandez, Greg Vanney and Mauricio Cienfuegos.

Starting goalkeeper Kevin Hartman also missed the contest after spraining his left knee in practice Thursday.

The Galaxy lost two more starters during the game. Zak Ibsen (pulled hamstring) and Simon Elliott (flu) both departed before intermission.

With the victory, the Mutiny (12-9-2) took over sole possession of first place in the Central Division. Tampa Bay has a three-point advantage over the Chicago Fire.

The Mutiny continued a season long trend of misfiring on penalty kicks when Steve Ralston was stopped by goalkeeper Matt Reis in the 74th minute. Tampa Bay has converted just two of seven attempts this season.

Diallo picked up a yellow card in the first half and will serve a mandatory one-game suspension for exceeding yellow card point limits when the Mutiny face Chicago on Aug. 2.