The game was scoreless in the 9th minute when Chicago's Jeff Larentowicz redirected a free kick from Joel Lindpere onto the head of United's DeLeon -- and the resulting unlucky bounce found its way into the net.
The game remained 1-0 until the 85th minute when Mike Magee netted an insurance tally off an assist from Patrick Nyarko as the Fire (3-7-2) snapped a four-game winless streak.
Reeling United (1-10-2), meanwhile, saw its own winless streak reach 11 matches.
Kate Middleton recycles dress at movie premiere
Couple mistakenly served bag of cash at McDonald's drive-thru