In 2014, Grala ran in the Continental Tire SportsCar Challenge, where he became the youngest driver ever to compete in an International Motor Sports Association (IMSA) event at the age of 15 years and one week old. In 2016, Grala competed in his first Rolex 24 Hours of Daytona for Change Racing alongside former Rolex 24 winners Spencer Pumpelly and Justin Marks, in addition to race newcomer Corey Lewis; at the age of 17, Grala was the youngest driver in the field.