El Paso opened the scoring early, with Amando Moreno slotting home a cross in the first minute to give the home side a 1-0 lead.
The hosts then doubled their lead inside five minutes, as a deflected shot off the foot of Eric Calvillo found the back of the net to make it 2-0 in favor of El Paso.
Oakland began to find their footing after the slow start, but the score remained 2-0 at halftime.
Roots came out of the half with two changes, bringing in Danny Trejo and Danny Gomez to try to turn the match.
Despite the subs, El Paso extended their lead to 3-0 with a bicycle kick and a second goal from Amando Moreno.
Oakland fought till the end and found one goal back in the 90th minute through Peter Wilson as the game ended 3-1 in favor of El Paso.
Roots return home for their next action as they host Hartford Athletic on Tuesday October 7th at 7PM PT.
