Acquired from the Galaxy on Saturday, Magee headed in a goal in the 11th minute to give the Fire a 1-0 lead.
"It was great not only for Mike to have a good game and score but also for Chris Rolfe," Fire coach Frank Klopas said. "I think games like this are never easy. You see around the world just the upsets that take place and there are great opportunities for teams like Charlotte to compete against MLS teams and also for players to showcase their abilities. More than anything we had to take the game very serious, which we did but it was a great night. The facilities here were great, they're a great team and we kept a clean sheet and so it was nice for us."
The Fire will host the Columbus Crew in the fourth round of the Cup on June 12 at Toyota Park.