San Antonio were stunned early as NTX continued their good goal scoring form with a corner allowing Clifford Spence to score thanks to poor Scorpions defense.
After the goal the Rayados were able to just park the bus and sit back, inviting the Scorpions on them as they easily held out.
Within 20 minutes the Scorpions chances of advancing took a heavy hit as Alberto Rodriguez continued his incredible scoring form, launching a power effort from just past halfway that stunned Jeremy Vuolo and the Scorpions, putting NTX 2-0 up.
The Scorpions had their first chance of the match in the 24th minute as Leo Cruz was able to hit a free kick that beat the wall and the keeper but bounced back off the post.
That was about as good as it would get for the Scorpions in the half as NTX Rayados managed to hold out and keep it at 2-0 at the break.
Scorpions coach, Alen Marcina must have had words of wisdom at the interval because the Scorpions came out and showed that they were the professional team as they took charge of the match in the second half with Walter Restrepo coming in after the break.
The change paid off just four minutes in as a cross came in from Josue Soto and found Restrepo, who headed home the goal, his first in Scorpions colors, and gave the Scorpions a chance.
It was all San Antonio but the Rayados were holding firm, until the pressure finally told in the 64th minute as Sainey Touray made space for himself and launched a rocket of a shot from the top of the box to level the scores.
Five minutes later and the Scorpions were in front, and again it was Touray scoring, with Soto picking up another assist, sending the ball for Touray who scored the vital goal.
Soto was given a reward for his hard work in the 77th minute when Touray was brought down in the box, it was Soto who stepped up to take the penalty and bury it to put the Scorpions 4-2 up and seal the win.
With the win the Scorpions move in to the fourth round, where they will play FC Dallas in Frisco on June 17th, the Scorpions will be hoping to repeat their pre-season form when they beat Dallas in San Antonio.