Greaves (born June 1, 1995) is a professional American off-road racing driver from Abrams, Wisconsin.

Greaves won the 2013 AMSOIL Cup world championship race in his Pro 2 truck.

His father Johnny Greaves who started in buggies and rose up through the ranks, eventually racing in the premier 4-wheel-drive Pro 4 trophy trucks.

To focus on his racing career, C. J. did not attend a physical high school and instead took online classes.

He started from the pole position for the season's first Pro Light race at the Charlotte Motor Speedway dirt track and he finished on the podium in third.

Greaves battled his father Johnny (in his Pro 4 truck) for the final four laps, well ahead of third-place Chad Hord.

[8] In the higher ranking Pro 2 class, he won the season championship over Chad Hord, Jeff Kincaid, Steve Barlow, and Jarit Johnson.

[8] He also made his first start in the highest ranking Pro 4 class and finished ninth in the season points.

[9] The following year, he competed at X Games Austin 2015, driving in the Stadium Super Trucks category.