Didero is possibly best known for his success in the Supermodified division at Oswego Speedway, where he and car owner Skip Matczak won two dozen features on his way to three consecutive Track Championships in 1994, 1995 and 1996, capped by wins in the 1996 International Classic.
Oswego Speedway Supermodified class track champions have included multi-time champs Nolan Swift (eight times, 1953–71), Bentley Warren (seven times, 1983–93), Jim Shampine (seven times, 1967–79), Greg Furlong (four times, 2000–07), Eddie Bellinger, Sr. (three times, 1957–60), and Doug Didero (three times, 1994–96).
Indianapolis Motor Speedway | Motorcycle speedway | Daytona International Speedway | Texas Motor Speedway | Speedway World Championship | Michigan International Speedway | Kentucky Speedway | Individual Speedway Junior World Championship | New Hampshire Motor Speedway | Martinsville Speedway | Kansas Speedway | Dover International Speedway | Charlotte Motor Speedway | Oswego, Illinois | Oswego | motorcycle speedway | Las Vegas Motor Speedway | International Speedway Corporation | Homestead-Miami Speedway | Rockingham Motor Speedway | Oswego County, New York | Lake Oswego, Oregon | Fort Oswego | Bristol Motor Speedway | 1995 Speedway Grand Prix | Salem Speedway | Rockingham Speedway | Nazareth Speedway | Lake Oswego | Indianapolis Motor Speedway Radio Network |