Seth Hammaker Bio
Seth Hammaker (born 29 September 2000) is an American professional Motocross and Supercross racer competing in the 250 classes. He is a three-time main event winner in the AMA Supercross Championship and has spent his entire professional career with the Monster Energy Pro Circuit Kawasaki team. Hammaker is widely regarded as one of the most promising talents in American dirt bike racing, having turned heads with a debut professional victory in only his third start. He is also known for his trademark racing number 56, which has appeared on his Kawasaki machines throughout his career.
Beyond Supercross, Hammaker competes in the AMA National Motocross Championship and the SuperMotocross World Championship playoff series, where he has produced standout rides against the sport’s top competitors. His career has been defined by remarkable highs, including multiple race wins, alongside significant challenges, including several injury-plagued seasons that have tested his resilience.
Early Life and Background
Seth Hammaker was born on 29 September 2000 in Bainbridge, Pennsylvania, in the United States. Growing up in a region with a strong motocross tradition, he was exposed to motorcycle racing at a young age and quickly developed a passion for the sport. Pennsylvania’s mix of amateur tracks and outdoor riding areas provided an ideal environment for him to develop his skills and progress through the amateur ranks.
From his earliest years, Hammaker showed the kind of dedication required to reach the upper levels of the sport. He committed to a strict training schedule, balancing school with travel to regional and national amateur events. The support of his family and his local racing community helped lay the foundation for what would become a successful career in professional motocross.
Path to Pro Racing
Hammaker worked his way up through the American amateur motocross system, earning his first major recognition at the 2016 AMA Amateur National Motocross Championship, where he claimed the Super Mini 1 title and finished second in the Super Mini 2 class. A strong showing at the Monster Energy Cup later that year helped him earn a place on the Team Green Kawasaki amateur programme, which is widely recognized as one of the top development pathways in the sport.
He continued to build his reputation in 2017, finishing second in the 250 B class at the Amateur Nationals and winning the Amateur All-Stars class at the Monster Energy Cup. Another second-place finish followed in 2018 at the Amateur Nationals, this time in the Open Pro Sport class. Following the disruption caused by the COVID-19 pandemic and a shortened amateur season, Hammaker transitioned to the professional ranks with Monster Energy Pro Circuit Kawasaki, making his professional debut in 2021.
Seth Hammaker Career
Early Career (2021)
Seth Hammaker made his professional debut for Monster Energy Pro Circuit Kawasaki in the 2021 AMA Supercross Championship, competing in the 250SX West class. He finished sixth on debut at Orlando before taking a memorable first professional win at Arlington in only his third race, an achievement that announced his arrival on the national stage. Over the remaining rounds of the season, he added two third-place finishes, ending the championship in fourth overall. These results earned him the AMA Supercross Rookie of the Year award for 2021, a recognition of his immediate impact in the sport.
His first professional Motocross season was limited, as he was only able to contest three rounds before illness forced him out of the remaining events. Despite the shortened campaign, the season confirmed his potential as both a Supercross and Motocross competitor and reinforced his place within the Pro Circuit Kawasaki development system.
AMA Supercross Breakthrough (2021–2025)
Hammaker opened the 2022 AMA Supercross Championship with strong results, finishing second and third in the opening two rounds of the 250SX West class. A practice crash then ended his Supercross season due to serious injuries that included a spleen laceration and compression fractures in two vertebrae. He returned for the 2022 AMA National Motocross Championship, where he posted eight top-ten overall finishes and ended the series seventh in the final standings. The 2023 season brought more misfortune, as a pre-season wrist injury ruled him out of Supercross entirely, although he returned for the second half of the 2023 AMA National Motocross Championship, securing five top-ten overall finishes across seven rounds.
In 2024, Hammaker struggled for consistency and finished tenth in the 250SX East class of the AMA Supercross Championship. He then missed the entire 2024 AMA National Motocross Championship due to a shoulder injury suffered before the start of the season. The 2025 season marked a major turning point, as he finished third at Daytona and then captured his second professional Supercross win the following weekend in Indianapolis. Consistent results across the next three rounds saw him tied for the championship lead, before a second season win at East Rutherford gave him the outright lead.
Hammaker entered the final round of the 2025 AMA Supercross Championship one point behind Tom Vialle, who had taken the lead at the penultimate event. A crash with fellow contender RJ Hampshire in the finale dropped him to second in the final standings, three points behind Vialle in the 250SX East class. Later that summer, he recorded his first three top-three race finishes during the 2025 AMA National Motocross Championship, finishing seventh overall, and went on to finish second overall in all three SuperMotocross playoff events to end as runner-up in the 250SMX class.
Monster Energy Pro Circuit Kawasaki Era (2021–Present)
Hammaker has remained with Monster Energy Pro Circuit Kawasaki throughout his professional career, beginning with his debut season in 2021. The team, run by Mitch Payton, is one of the most established development operations in the sport and has produced numerous champions across the 250 classes. Hammaker’s long-term partnership with the team has allowed him to develop consistency despite multiple injury setbacks that have interrupted several of his seasons.
His recent form with the team has been among the strongest of his career, with race wins in 2025 and a runner-up finish in the 250SX East standings. The combination of his renewed health and continued support from Pro Circuit Kawasaki has positioned him as a serious contender in both Supercross and the SuperMotocross World Championship playoff format.
Driving Style and Strengths
Hammaker is known for his smooth, precise riding style and his ability to remain consistent across long main events. He is particularly effective on technical Supercross tracks, where his race craft and aggressive passing have produced several late-race charges. His partnership with the Monster Energy Pro Circuit Kawasaki crew has also allowed him to develop strong communication and setup feedback, which has been a key factor in his recent results.
Notable Races and Milestones
His first professional victory at Arlington in 2021 stands as a career-defining early milestone, achieved in only his third professional start. His 2025 Supercross win at Indianapolis and the title fight that followed reinforced his credentials as a championship-caliber rider. Across his career, Hammaker has also competed in the SuperMotocross World Championship, the AMA National Motocross Championship, and the Monster Energy Cup, building a varied and resilient resume.
Seth Hammaker Career Wins
Seth Hammaker has recorded three main event victories in the AMA Supercross Championship across his professional career. His wins are split between his breakthrough 2021 season and his strong 2025 campaign, with each victory highlighting his ability to perform at the highest level of the sport.
AMA Supercross Highlights
Hammaker’s first Supercross win came at Arlington in 2021, in just his third professional start, immediately establishing him as a rising talent. After several injury-interrupted seasons, he returned to the top step in 2025 with a win at Indianapolis, followed by another victory at East Rutherford. He finished the 2025 250SX East class as runner-up, three points behind champion Tom Vialle.
Other Wins and Performances
Beyond Supercross, Hammaker has produced consistent top-ten results in the AMA National Motocross Championship and finished as runner-up in the 250SMX class of the SuperMotocross World Championship playoff series. He has also competed in the Monster Energy Cup and represented the United States as a top-tier 250-class talent.
Seth Hammaker Family
Family Background and Racing Lineage
Details about Seth Hammaker’s immediate family have not been widely confirmed in publicly available sources. He has credited his family and the Pennsylvania racing community for supporting his early development in the sport.
Personal Life
Hammaker continues to be based in the United States, where he trains and competes as part of the Monster Energy Pro Circuit Kawasaki team. Public information about his personal relationships, marital status, or children has not been confirmed in available sources.
2025 Season Performance
The 2025 season represented a major return to form for Seth Hammaker, highlighted by three main event wins in the 250SX East class of the AMA Supercross Championship. He was a title contender throughout the season, eventually finishing as runner-up to Tom Vialle by a narrow three-point margin after a late-race incident in the finale.
During the summer 2025 AMA National Motocross Championship, Hammaker recorded his first three top-three race finishes, although an overall podium eluded him as he ended the series seventh. He then produced one of his strongest performances of the year in the SuperMotocross World Championship playoff rounds, finishing second overall in all three events to claim the runner-up spot in the 250SMX class.
Heading into the next season, Hammaker’s combination of health, experience, and continued support from Monster Energy Pro Circuit Kawasaki positions him as a leading candidate for future championships. His 2025 results suggest that he has moved past the injury struggles of previous years and is ready to compete for titles across both Supercross and Motocross.
