watch 01:16 The Loop (Movies) Do you like this video? J.D. McPillar is a character in Cars 3. Cars 3 J.D. McPillar competes in the Piston Cup Racing Series as part of the next-generation of racers. He is sponsored by Tow Cap and wears the number 4. The veteran racer he replaced mid-season is Jack DePost. Retrieved from "https://pixar.fandom.com/wiki/J.D._McPillar?oldid=177665" Categories: Cars 3 Characters Community content is available under CC-BY-SA unless otherwise noted.