The No. 1 pick in the 2015 NHL Draft had three goals in two 20-minute halves of 4-on-4 play, then scored two more in seven minutes at 3-on-3, leading his team to an 8-6 win.
The scrimmage, dubbed the Billy Moores Cup after a former Edmonton assistant coach, ended the Oilers' six-day orientation camp.
"It was fun. Anytime you get a chance to play in front of fans like that, it's always exciting," McDavid said. "It was pretty competitive, just with the guys that we had, and they made a lot of great plays out there."