McMillan caught both his targets for 25 yards in Friday's 34-17 preseason win over the Jaguars.
The Panthers' starting offense played the entire first quarter, and McMillan helped set up the team's first touchdown of the night with a pair of receptions from Bryce Young. McMillan is the clear top downfield option in Carolina after a rookie campaign in which the eighth overall pick in the 2025 NFL Draft recorded a 70-1,014-7 line on 122 targets over 17 regular-season games, before hauling in five catches on seven more targets for 81 yards in a wild-card loss to the Rams.