Chas Mortimer, English racing motorcyclist
Charles 'Chas' Mortimer (born 14 April 1949) is an English former professional motorcycle short-circuit road racer and race-school instructor. He competed in the Grand Prix motorcycle road racing world championships from 1969 to 1979. He remains the only competitor to have won FIM Grand Prix races in the 125, 250, 350, 500 and 750 world championship classes.