Len Duncan is a American Formula 1 driver born on July 25, 1911. The first race Len Duncan drove was the 1954 Indianapolis 500. Since then Duncan has driven 1 races in total.
In these 1 races, Duncan won 0 races, finshed on the podium 0 times and scored a total of 0 points. The 1954 Indianapolis 500 was the last race Duncan has entered.
Len ended his career driving for Schroeder.