A North Carolina native, Blaney is a third-generation racer and son of former Cup series driver Dave Blaney. Blaney drives the No. 12 car for Team Penske and earned his first professional career at the Pocono Raceway in 2017. He has participated in 102 races over the course of 5 years.
In 2018, Blaney partnered with BODYARMOR Sports Drink to honor military heroes through the BODYARMOR Heroes program. SGT Marcus Hayward was honored by Blaney and BODYARMOR and featured on the No. 12 car's paint out at the July race in Daytona.
- Finished 9th in standings in 2017
- Winner of 2017 Pocono 400
- Winner of 2018 Cam Duel