Perry Kitchen broke a 4-4 tie in the 79th minute and DC United beat Real Salt Lake 6-4.
The 10 goals fell one short of the MLS single-game record.
Kitchen's header, off of a long service from Taylor Kemp, beat Jeff Attinella for the difference-maker. Nick Deleon's left-footed blast from way outside provided insurance six minutes later.
The teams combined for seven goals in the second half, one short of the record for most goals in a half.
Real Salt Lake jumped ahead 2-0 on goals by Joao Plata and...