Seth Hammaker
American motocross racer
Seth Hammaker (born 29 September 2000) is an American professional Motocross and Supercross racer. Hammaker is a four-time main event winner in the AMA Supercross Championship.
Hammaker has been racing professionally in the AMA Supercross Championship and AMA Motocross Championship. For his entire career to date, he has competed for the Monster Energy Pro Circuit Kawasaki team in the 250 classes. Hammaker finished runner-up in the 250SX East class of the 2025 and 2026 AMA Supercross Championship.
Hammaker took his first professional supercross win at Arlington in the 2021 season, in what was only his third race since debuting. After facing several stints on the side lines due to injury, he would not win again until the 2025 season.
Career
Amateur career
Hammaker worked his way up through the ranks of the American amateur system, achieving his first notable results in the 2016 AMA Amateur National Motocross Championship, where he won the Super Mini 1 title and finished second in the Super Mini 2 class. A top-ten finish at the Monster Energy Cup later that year saw Hammaker join the Team Green Kawasaki amateur programme.
After picking up a second in the 250 B class at the Amateur Nationals in 2017, Hammaker returned to the Monster Energy Cup, where he was able to win the Amateur All-Stars class.
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This entry incorporates text from “Seth Hammaker” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.