He made his NASCAR Cup Series debut in 1970 at Hickory Motor Speedway and steadily climbed the ranks, finishing second in the Late Model Sportsman standings in 1975 before capturing the championship in 1980.  In the 1980s, Morgan moved into the NASCAR Cup Series full-time, earning his first victory in 1981 at Martinsville Speedway.  Known for his versatility and determination, he competed for multiple teams while also finding success in the Busch (O’Reilly Auto Parts) Series.

During the 1990s, Morgan reached the peak of his career, finishing as high as fifth in NASCAR Cup Series points in 1990 and adding multiple victories across both the NASCAR Cup Series and Busch (O’Reilly Auto Parts) Series.  He remained a consistent and respected competitor with top organizations such as Bud Moore Engineering and Wood Brothers Racing, delivering strong performances throughout the decade.

In the late 1990s and 2000s, Morgan transitioned into part-time competition and independent racing efforts.  He frequently drove for smaller teams or his own organizations, including Victory in Jesus Racing and Faith Motorsports, while continuing to compete in the NASCAR Truck Series and Busch/Xfinity Series.

Morgan continued racing into the later stages of his career, making his final starts in 2019.  Over an incredible 52 consecutive years (1967–2019), he amassed 4 NASCAR Cup Series wins and 15 NASCAR Busch (O’Reilly Auto Parts) Series victories, along with a total of 1,044 starts across NASCAR’s top three series (Cup, Busch, and Truck).  Morgan built one of the longest and most enduring careers in motorsports history—evolving from his moonshine-running roots into a respected NASCAR veteran known for his faith, perseverance, roller skating, and remarkable longevity.