Jason Leffler's fascination with racing started at a young age and propelled him to record-setting success at many levels, eventually steering him toward the nation's premier series.
In 1989, at the age of 13, Jason Leffler began his career racing quarter-midgets before advancing to the three-quarter-midget ranks in 1992. After graduating from high school, he began racing midgets full time and just three years later won his first USAC Midget National title. The following year, he not only took the title again, but also scored a Silver Crown National Championship.
Leffler didn't stop there. In 1999, he became the first driver in 37 years to capture three consecutive USAC National Midget titles. That year, he also made his inaugural venture in the ranks of NASCAR when he entered the Busch Series event at Indianapolis Raceway Park. He later competed in an ARCA race at Atlanta Motor Speedway, starting fourth and taking the checkered flag.
Leffler joined Joe Gibbs Racing in 1999 running three Busch Series races. In 2000, he enjoyed a successful full season for JGR in the Busch Series, finishing fifth in the Raybestos Rookie of the Year race. He started from the pole three times and scored two top-five and five top-10 finishes on his way to 20th in the point standings.
Leffler and JGR parted company in 2001 and Leffler raced full-time in the Cup Series during the 2001 season. During his inaugural year at the top level of the sport, Leffler captured his first pole at Kansas Speedway and finished the season fourth in the rookie of the year battle.
2002 brought a new opportunity for Leffler, who chose to join the ranks of the Craftsman Truck Series. He captured eight poles and posted 11 top-fives and 15 top-10 finishes on his way to fourth place in the series championship.
Leffler scored his first Truck Series win at Dover in May 2003. Though he was in the hunt for the series championship, he opted to return to Cup racing. In 10 races, he picked up two top-10 qualifying efforts.
Then in 2004, Leffler went back to the Busch Series where he notched his first victory at Nashville Superspeedway in June.
In 2005, Jason returned to the Nextel Cup series with Joe Gibbs Racing. The two parted ways in midseason. It was then that Leffler found a home at Braun Racing, driving for the team the remainder of the 2005 season.
