M. L. Fredericks, nicknamed "Curley" (or "Curly"), was an American motorcycle racer.
Fredericks was born in Denver, Colorado. In 1921, he became the American Motorcycle Association's Class A (stock) champion, riding for Indian.
On August 21, 1926, riding an Indian Altoona racing bike at Rockingham Park in Salem, New Hampshire, Fredricks turned a lap in 37.4 seconds. In doing so, he set a record of , fastest ever on a board track. The record still stands.
Fredericks was also 1928 AMA National Champion, on a Indian. His victory on 4 August 1928 would be the last ever recorded on a board track. Fredericks was inducted into the AMA Hall of Fame in 1998