Malcolm Stewart Bio
Malcolm Stewart (born October 27, 1992) is an American professional motocross racer who has competed in the AMA Supercross and Motocross championships since 2011. He is best known as the 2016 AMA Supercross 250cc East Champion and currently rides for Rockstar Energy Husqvarna Factory Racing in the premier 450cc class. Over more than a decade in the professional ranks, he has progressed from a 250cc rookie to a consistent podium contender in the 450cc division.
Early Life and Background
Malcolm Stewart was born on October 27, 1992, in Haines City, Florida. Growing up in a household with deep ties to motocross, he was introduced to motorcycles and off-road riding at a young age, following in the footsteps of his older brother, James Stewart Jr. The Stewart family became one of the most recognized names in American motocross, and that environment shaped Malcolm’s early understanding of the sport.
From his earliest years, Stewart competed in amateur motocross events, gradually building his skills against top regional talent. While his brother’s amateur career drew most of the attention, Malcolm steadily developed his own race craft and earned a reputation for hard work and consistency. Those formative years in Florida’s amateur circuit laid the foundation for his eventual move into the professional ranks.
Path to NASCAR
Stewart’s professional path runs through American motocross rather than stock car racing, and his progression followed a traditional ladder through the 250cc division. He made his professional debut on February 12, 2011, at Reliant Stadium in Houston, Texas, riding for team ARMA-Suzuki City-Nitro Circus in the 250cc Lites eastern division. His first seasons were marked by steady improvement as he adjusted to the demands of weekly professional competition.
After a developmental period, Stewart signed with GEICO Honda for the 2014 and 2015 AMA Supercross seasons. In 2014, he stepped up to the 450cc class and posted top-10 finishes in nine of the first eleven rounds before kidney problems linked to dehydration forced him out of the final rounds. That season showed he could compete with established riders and set the stage for his first major breakthrough the following year.
Malcolm Stewart Career
Early Career (2011-2015)
Stewart’s early professional years were defined by learning curves and gradual results. Riding for ARMA-Suzuki City-Nitro Circus in 2011, he gained valuable experience in the 250cc Lites East division and began to measure himself against proven race winners. His progression was steady rather than explosive, and that measured development helped prepare him for higher-level opportunities.
His move to GEICO Honda in 2014 marked a clear step forward, giving him access to a factory-supported program. Competing part-time in the 450cc class during the 2014 supercross season, he proved he could run with the sport’s top riders. The following year, he returned to the 250cc class and refined his approach, setting up a championship run the next season.
250cc Breakthrough (2016)
The 2016 season represented the turning point of Stewart’s career. Riding in the AMA 250cc East Supercross Championship, he delivered the most consistent season of his career, recording two race wins and six podium finishes on his way to the title. The championship confirmed he had grown from a developing rider into a title contender.
Following his title, Stewart chose to skip the 2016 Lucas Oil Pro Motocross Championship in order to focus on preparation for the 2017 season. That decision reflected his intent to move full-time into the premier 450cc division, where he planned to test himself against the sport’s established stars.
450cc Development (2017-2021)
Transitioning to the 450cc class in 2017, Stewart faced a steep learning curve and initially struggled to secure a full-time factory ride. He competed in select events as a privateer and kept his name in the results while searching for a longer-term opportunity. In 2018, he was signed as a fill-in rider for Joe Gibbs Racing Suzuki, an experience that kept him connected to factory-level equipment and competition.
Over the following seasons, Stewart built on those opportunities with teams including Smartop/MotoConcepts Honda, where he continued to develop his race craft. He became known for steady finishes and flashes of speed, gradually earning the respect of rivals and the attention of larger factory programs.
Rockstar Energy Husqvarna Era (2022-Present)
In 2022, Stewart joined Rockstar Energy Husqvarna Factory Racing for a full AMA Supercross 450cc season, a move that gave him the support and resources of a top program. He soon began working with renowned trainer Aldon Baker, a partnership that sharpened his conditioning and his approach to race weekends. The results quickly followed, with regular top-five finishes and three podium appearances to his credit.
In 2025, at round five in Tampa, Stewart earned his first career win in the 450cc class, more than ten years after first stepping into the premier division. That victory marked a major milestone and signaled that he had arrived as a consistent winner at the top level of AMA Supercross.
Driving Style and Strengths
Stewart is recognized for his smooth, calculated riding style and his ability to manage long main events. His strengths include technical corner work, consistent lap times, and the patience to capitalize on late-race opportunities. Working closely with Aldon Baker has improved his physical preparation, and his partnership with the Rockstar Energy Husqvarna crew has helped him turn speed into results.
Notable Races and Milestones
Stewart’s signature results include his 2016 AMA 250cc East Supercross Championship, where two race wins and six podiums secured the title. His first 450cc class victory in Tampa in 2025 stands as another defining moment. Combined with his brother’s premier-class main event win, the Stewarts became the first siblings in the sport’s history to each win a premier-class main event.
Malcolm Stewart Career Wins
Malcolm Stewart’s verified major results include the 2016 AMA Supercross 250cc East Championship, individual 250cc race wins from that championship season, and his first 450cc class victory in 2025. These results cover the confirmed highlights of his professional career in AMA competition.
250cc Highlights
Stewart’s 250cc résumé is anchored by his 2016 AMA Supercross 250cc East title, earned with two race wins and six podium finishes across the season. That championship remains the clearest highlight of his early career and demonstrated his potential to compete at the front of the field. His progression from a 2011 rookie in the 250cc Lites East division to champion five years later marked steady, deliberate development.
450cc Highlights
In the 450cc class, Stewart’s standout results include regular top-five finishes and three podium appearances after joining Rockstar Energy Husqvarna Factory Racing in 2022. His first 450cc class win came in 2025 at round five in Tampa, more than a decade after he first entered the premier division. That breakthrough validated years of work with his team and trainer.
Malcolm Stewart Family
Family Background and Racing Lineage
Malcolm Stewart is the younger brother of James Stewart Jr., one of the most successful American motocross racers of his generation and a former champion in both supercross and motocross. The brothers share a deep connection to the sport, having grown up around motorcycles in Florida. Their shared history produced a unique distinction in the sport, as Malcolm and James became the first siblings in motocross history to each win a premier-class main event.
Personal Life
Stewart was born and raised in Haines City, Florida, and continues to be closely identified with the state’s motocross community. He has kept much of his personal life private, with limited verified public information beyond his family ties to the sport and his long-standing connection to his brother James.
2025 Season Performance
Stewart’s 2025 AMA Supercross season is the campaign in which he has reached a new level in the 450cc class. Riding once again for Rockstar Energy Husqvarna Factory Racing, he has continued the consistency that defined his previous seasons with the team, regularly running inside the top five and converting strong speed into podium results.
His first 450cc class career win came at round five in Tampa, a milestone that arrived more than ten years after his premier-class debut. That victory signaled a shift in his role from reliable contender to proven winner and added momentum heading into the second half of the supercross calendar.
With factory support, a refined training program under Aldon Baker, and a deep understanding of the 450cc class, Stewart enters the closing rounds of the 2025 season focused on building toward playoff positioning. His partnership with the Husqvarna crew remains central to his outlook, and his early-season results suggest he is well placed to remain a factor in the championship fight.
