James Stewart Jr. (born December 21, 1985) is an American former professional
motocross
Motocross is a form of off-road motorcycle racing held on enclosed off-road circuits. The sport evolved from motorcycle trials competitions held in the United Kingdom.
History
Motocross first evolved in Britain from motorcycle trials competi ...
and supercross racer, widely regarded as one of the most talented and dynamic riders in the history of the sport. Known for his raw speed and innovative riding techniques, Stewart earned two
AMA Supercross 450cc championships, one
AMA Motocross 450cc championship, & two 125cc AMA Supercross titles. He is 6th in all-time 250cc supercross west class wins, 3rd in all-time supercross 450cc class wins, and 1st in all-time 125cc wins, placing him among the most successful riders of all time.
Nicknamed "Bubba," Stewart revolutionized motocross with his aggressive riding style and groundbreaking "scrub" technique, which allowed him to clear jumps faster and with more precision than his competitors. This innovation not only changed how the sport was raced but also became a signature move emulated by racers worldwide. His contributions to the sport earned him the moniker "The Fastest Man on the Planet."
Stewart's influence extended beyond the track, becoming the first
African American
African Americans, also known as Black Americans and formerly also called Afro-Americans, are an Race and ethnicity in the United States, American racial and ethnic group that consists of Americans who have total or partial ancestry from an ...
rider to dominate motocross and supercross at the highest levels. His success and charisma helped expand the sport’s appeal to a broader audience. He also starred in his own reality television series, ''Bubba’s World'', which showcased his life and career, along with several video games such as ''James Stewart’s Motocross''.
Since discontinuing racing in 2016 and formally retiring from professional racing in 2019, Stewart remained relatively quiet in the industry, until returning to the sport as an on-camera commentator for the AMA Motocross and Supercross championships in 2022.
Career
James Stewart Jr. was born on December 21, 1985, in
Bartow, Florida
Bartow ( ) is a city and the county seat of Polk County, Florida, Polk County, Florida, United States. Founded in 1851 as Fort Blount, the city was renamed in honor of Francis S. Bartow, the first brigade commander of the Confederate Army to di ...
,
and began racing motocross under the guidance of his father at the age of four. During his amateur career, Stewart achieved significant success, securing 84 race victories and 11
Loretta Lynn's Amateur National Championship titles between 1990 and 2001.
Stewart turned professional in 2002, joining
Kawasaki and competing in the 125cc class of the AMA Western Regional Supercross Championship. Stewart earned his first professional victory at round 2 of the series and would stay competitive through the entire series, coming short of the title by only 7 points.
In the 2002 AMA Motocross season, he demonstrated a commanding performance in the 125cc class, winning his debut race of the series at
Glen Helen Raceway and securing the title after winning 10 of the series' 12 rounds. In 2004, he transitioned to the AMA 125cc West Supercross series, securing another championship and further cementing his dominance in the class. Following this, he introduced the "scrub" technique, an innovation that minimized airtime over jumps and became a foundational skill for riders at the elite level.
In 2005, Stewart moved to the premier 450cc class with Kawasaki. The transitional year brought Stewart his first Supercross premier class win in Texas in round 12, but also inconsistency due to crashes and injuries. Despite these challenges, he would finish the series 10th in point standings.

The 2006 and 2007 seasons saw Stewart achieve significant milestones. He won several rounds in the AMA Supercross series, finishing second overall behind
Ricky Carmichael. Later that year, he represented Team USA at the
Motocross des Nations
The Motocross of Nations (MXON), also known by its original French name (''MXDN'') is an annual team motocross race, where riders representing their country meet at what is billed as the " Olympics of Motocross". The event has been staged since ...
in Matterley Basin, England, alongside
Ryan Villopoto
Ryan Daniel Villopoto (born August 13, 1988, in Fortuna, California) is an American former professional motocross and supercross racer who competed in the AMA Motocross Championships from 2005 to 2014; a four-time 450cc AMA Supercross Champion, a ...
and
Ivan Tedesco. The team secured victory, with Stewart contributing strong performances in his motos. Stewart claimed his first AMA Supercross Championship in 2007, winning 13 of 16 races during the season. This achievement made him the first African American to win a major motocross or supercross title. However, injuries forced him to miss the outdoor motocross season.
In 2008, after missing the entirety of the supercross season due to a torn ACL, Stewart achieved one of the rarest accomplishments in motocross history: a perfect season in the AMA Pro Motocross Championship. After recruiting
Aldon Baker
Aldon Baker (born 1971 in Pietermaritzburg, South Africa) is a trainer of motorcycle racers.
Early life
Aldon was a club level motorcycle roadracer before being inducted into the South African army. He was a two-time winner of the South African ...
to help him heal from the injury, he would go on to win all 24 motos in the 450cc class, joining Ricky Carmichael as the only riders to complete such a feat. He also represented Team USA again at the Motocross des Nations, held at
Donington Park
Donington Park is a motorsport Race track, circuit located near Castle Donington in Leicestershire, England. The circuit business is now owned by Jonathan Palmer's MotorSport Vision organisation, and the surrounding Donington Park Estate, sti ...
in England, contributing to another team victory.
The 2009 season saw Stewart claim his second AMA Supercross Championship. Over the course of the season, he engaged in intense battles with close rival
Chad Reed, ultimately landing four points ahead of Reed and winning 11 of 17 rounds to secure the title. This season in particular is remembered for the intensely competitive rivalry between Stewart and Reed.

From 2010 onward, Stewart's career was marked by intermittent success. He delivered strong performances, including race wins, but struggled with the new
Yamaha bike he had been assigned to ride in 2012,
eventually leading to his departure from
Joe Gibbs Racing
Joe Gibbs Racing (JGR) is an American professional stock car racing organization founded by Pro Football Hall of Fame coach Joe Gibbs. His son, J. D. Gibbs, ran the team with him until his death in 2019. Founded in Huntersville, North Carolina, ...
after only one year. One day after announcing his split from JGRMX and Yamaha, Stewart signed to ride with Yoshimura
Suzuki
is a Japanese multinational mobility manufacturer headquartered in Hamamatsu, Shizuoka Prefecture, Shizuoka. It manufactures automobiles, motorcycles, all-terrain vehicles (ATVs), outboard motor, outboard marine engines, wheelchairs and a va ...
aboard their RMZ-450. In 2013, he won multiple rounds in both supercross and motocross, though injuries continued to impact his results. In 2015, Stewart was suspended for 16 months for failing an
anti-doping test after failing to submit the proper paperwork for a
Therapeutic Use Exemption (TUE) for medically-prescribed
Adderall
Adderall and Mydayis are trade names for a combination drug containing four salts of amphetamine. The mixture is composed of equal parts racemic amphetamine and dextroamphetamine, which produces a (3:1) ratio between dextroamphetamine and l ...
. As a result, he missed the entire 2015 season. Upon his return, Stewart competed sporadically but was unable to recapture his previous dominance due to ongoing injuries and the increasingly competitive field. His final race would be on July 23, 2016 in Washougal, Washington, finishing 15th overall.
On May 17, 2019, Stewart announced his retirement in a video posted to
YouTube
YouTube is an American social media and online video sharing platform owned by Google. YouTube was founded on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim who were three former employees of PayPal. Headquartered in ...
. "Where I'm at in my life, I think it's time to say I'm retiring. I've retired," he said in part. "It's hard for sure, because I love racing and I love the fans, I love the opening ceremonies, I love the autograph lines, but I don't miss the sweat and tears and training and having to feel like you have to win every race and having to be James Stewart. I don't love doing that anymore."
Since the 2023 season, he embarked as a regular commentator and analyst for the AMA SuperMotocross World Championship.
Other racing pursuits
Stewart made his
X Games
The X Games are a series of action sports events founded by ESPN Inc. and aired on ESPN networks and ABC. In late 2022, ESPN sold the long-running property to MSP Sports Capital, a private equity firm co-founded by Jahm Najafi and Jeff Mo ...
debut on July 30, 2009 at
X Games XV, and placed second in the best whip competition with 21% of the votes, winning his first X Games medal. He suffered a deep bruise to his bone and muscle in his left shoulder during seeding trials for SuperMoto on July 31, forcing him to drop out of the games.
In October 2011, Stewart signed to race for
Joe Gibbs Racing
Joe Gibbs Racing (JGR) is an American professional stock car racing organization founded by Pro Football Hall of Fame coach Joe Gibbs. His son, J. D. Gibbs, ran the team with him until his death in 2019. Founded in Huntersville, North Carolina, ...
, with a multiyear contract to run for JGRMX in motocross as well as plans to run
NASCAR
The National Association for Stock Car Auto Racing, LLC (NASCAR) is an American auto racing sanctioning and operating company that is best known for stock car racing. It is considered to be one of the top ranked motorsports organizations in ...
stock car
Stock car racing is a form of automobile racing run on oval tracks and road courses. It originally used production-model cars, hence the name "stock car", but is now run using cars specifically built for racing. It originated in the southe ...
races in the
K&N Pro Series East
The ARCA Menards Series East (formerly known by other names) is a regional stock car racing series owned and operated by the Automobile Racing Club of America (ARCA) and the National Association for Stock Car Auto Racing (NASCAR).
Races are h ...
and
Nationwide Series
The NASCAR Xfinity Series (NXS) is a stock car racing series organized by NASCAR. It is promoted as NASCAR's second-tier circuit to the organization's top level Cup Series. NXS events are frequently held as a support race on the day prior to a ...
. At the end of the 2012 supercross season, Stewart left Joe Gibbs Racing and JGRMX. Stewart said that he would be open to racing with Gibbs in the future but stated that he wanted to get back to being competitive in motorcycle racing, and that a change was necessary.
Other business ventures
On March 28, 2010, Stewart's reality show ''Bubba's World'' debuted and ran 10 episodes on
Fuel TV
Fox Sports 2 (branded on-air as FS2) is an American sports-oriented pay television channel owned by the Fox Sports Media Group, a unit of Fox Corporation. The channel is based at the Fox Sports division's headquarters on the Fox Studio Lot in ...
. The second season started in December, offered 13 episodes and concluded on February 24, 2011. There has been no announcement about a third season. In 2022, the ''Bubba's World'' title transitioned from documenting the day to day life of Stewart into a podcast format discussing current events within motocross and supercross racing.
Career results
AMA Motocross and Supercross
* 28 wins in 125/250 AMA Motocross 10-2002 7-2003 11-2004
* 18 wins in 125/250 AMA Supercross
* 50 wins in 450 AMA Supercross 3-2005 8-2006 13-2007 1-2008 11-2009 1-2010 5-2011 2-2012 1-2013 5-2014
* 20 wins in 250/450 AMA Motocross 3-2006 1-2007 12-2008 2-2012 1-2013 1-2014
* 116 total AMA wins 10-2002 7-2003 11-2004 3-2005 11-2006 14-2007 13-2008 11-2009 1-2010 5-2011 4-2012 2-2013 5-2014
Awards
Stewart won 2002 AMA Rookie of the Year.
He was also named one of "20 Teens Who Will Change the World" in the April 2003 issue of ''
Teen People'' magazine.
In 2022, Stewart was inducted into the
AMA Motorcycle Hall of Fame.
Personal life
His younger brother is fellow motocross racer
Malcolm Stewart.
On March 28th, 2011, Stewart was arrested for
impersonating a police officer, after attempting to stop another vehicle containing two off-duty highway-patrol troopers using red and blue police-style flashing lights. Stewart pled
"no contest" and was sentenced to 75 hours of
community service
Community service is unpaid work performed by a person or group of people for the benefit and betterment of their community contributing to a noble cause. In many cases, people doing community service are compensated in other ways, such as gettin ...
.
References
External links
*
*
Dirt Rider Magazine
"James Stewart and Kyle Chisolm racing Team San Manuel L&M Racing Yamahas"FUEL TV Series
{{DEFAULTSORT:Stewart, James Jr.
Living people
1985 births
Sportspeople from Bartow, Florida
Racing drivers from Florida
American motocross riders
AMA Motocross Championship National Champions
NASCAR drivers
African-American racing drivers
Doping cases in motorcycle racing
American sportspeople in doping cases
21st-century African-American sportsmen
20th-century African-American sportsmen