Len Duncan Formula One head-to-head driver comparisons
Back to Len Duncan career statistics
| Opponent | Races | Wins | Losses |
| Fred Agabashian | 1 | 0 | 1 |
| Frank Armi | 1 | 0 | 1 |
| Manny Ayulo | 1 | 0 | 1 |
| Tony Bettenhausen | 1 | 0 | 1 |
| Jimmy Bryan | 1 | 0 | 1 |
| Duane Carter | 1 | 0 | 1 |
| Larry Crockett | 1 | 0 | 1 |
| Art Cross | 1 | 0 | 1 |
| Jimmy Daywalt | 1 | 0 | 1 |
| Ed Elisian | 1 | 0 | 1 |
| Don Freeland | 1 | 0 | 1 |
| Sam Hanks | 1 | 0 | 1 |
| Gene Hartley | 1 | 0 | 1 |
| Bill Homeier | 1 | 1 | 0 |
| Jerry Hoyt | 1 | 0 | 1 |
| Andy Linden | 1 | 0 | 1 |
| Ernie McCoy | 1 | 0 | 1 |
| Jack McGrath | 1 | 0 | 1 |
| Mike Nazaruk | 1 | 0 | 1 |
| Cal Niday | 1 | 0 | 1 |
| Pat O'Connor | 1 | 0 | 1 |
| Johnnie Parsons | 1 | 1 | 0 |
| Jim Rathmann | 1 | 0 | 1 |
| Jimmy Reece | 1 | 0 | 1 |
| Paul Russo | 1 | 0 | 1 |
| Troy Ruttman | 1 | 0 | 1 |
| Chuck Stevenson | 1 | 0 | 1 |
| Bob Sweikert | 1 | 0 | 1 |
| Johnny Thomson | 1 | 0 | 1 |
| Bill Vukovich | 1 | 0 | 1 |
| Rodger Ward | 1 | 0 | 1 |
| Spider Webb | 1 | 0 | 1 |
