The full-season drivers who will take part in the ten championship rounds include the duo of Jonathan Bomarito (USA) and Harry Tincknell (GB) in the no. 55 car, joined by Oliver Jarvis (GB) and Tristan Nuñez (USA) in the sister no. 77 entry. In the four endurance races at Daytona, Sebring, Watkins Glen and Road Atlanta, the quartet will be reinforced by IndyCar driver Spencer Pigot and DTM champion René Rast.
The Mazda Team Joest has entered the 2018 IMSA WeatherTech SportsCar Championship, wherein it will run two Mazda RT24-P cars in the DPi prototype category.