Timothy Tyler Andrew Walker (born July 15, 1979), is an American race car driver. Walker is one of many racers who has competed in many interdisciplinary automotive ranks. His automotive exploits include cycling competition, open-wheeled sprint cars, where has obtained a large majority of his success and notoriety, as well as being a stock car pilot, formerly competing in the prestigious NASCAR ranks. The first fourth-generation driver to compete in NASCAR since the late Adam Petty, Walker is but one member of a racing legacy.

Walker began his racing career in two-wheeled vehicles. He started competing bicycles at the age of six and upgraded to motorcycles at the age of eight years. He then upgraded to go-karts, and won four California state karting championships and had a total of 200 wins. When he turned sixteen years old, an age where many of his peers were first learning to drive, Walker began his Sprint Car racing career. His first competitive foray was in the All Star Circuit of Champions series. He was victorious seven races throughout the season. In 1996, young Walker made his stock car debut in the ASA AC-Delco Challenge Series at Indianapolis Raceway Park. He timed in 33rd in the field during time trials, and finished twenty-seventh after his engine expired ninety-five laps into the racing session. Before long, he was invited to partake in the prestigious World of Outlaws competition and won several main feature events over the next two seasons. He also won Rookie of the Year honors in 1996 at the famous Knoxville Nationals. He would join the All-Star Circuit of Champions in 1997, winning seven races and claiming Rookie of the Year honors in his first full season of sprint car competition. The next calendar year, he swept all the main feature events in the World of Outlaws' Western World Championships at the famed Manzanita Speedway. He would follow up with a win at Tri-Main Speedway in 1999, the last year of the millennium.

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