| Nationality | USA |
| Born |
Races:
| Date | Round | Ferrari | S/N | No | Team | Result |
| 23.09.1950 | Grand Prix of Watkins Glen | 166 MM Touring Barchetta | 0054 M | 111 | 6. | |
| 31.12.1950 | 6h Sebring | 166 MM Touring Barchetta | 0054 M | 10 |
William Spear
|
4. |
| 18.03.1951 | Grand Prix of Buenos Aires | 166 MM Touring Barchetta Lusso | 0054 M | 4 | 8. | |
| 23.-24.06.1951 | Le Mans 24 Hours | 340 America Barchetta Touring | 0118 A | 17 | William Spear | retired/clutch |
| 26.08.1951 | SCCA National Elkhart Lake | 340 America | 0118 A |
132
|
William Spear
|
5. |
| 15.09.1951 | Seneca Cup | 166 MM | ||||
| 15.09.1951 | Watkins Glen | 340 America Barchetta Touring | 0118 A |
86
|
William Spear
|
3. |
| 15.09.1951 | Watkins Glen |
166 MM
|
34
|
William Spear
|
not classified
|
|
|
20.10.1951
|
Allentown (Handicap)
|
340 America
|
39
|
William Spear
|
12.
|
|
| 09.12.1951 | Riviera Palm Beach Trophy | 166 MM Touring Barchetta | 0054 M | 11 | 4. | |
| 08.03.1952 | 12h Vero Beach | 166 MM Touring Barchetta | 0054 M | 31 | 3. | |
| 15.03.1952 | 12h Sebring | 340 America | 014 A or 0118 A | other starters | ||
| 00.00.1953 | Lockbourne AFB | 340 Mexico Spyder Vignale | 0228 AT | 1. | ||
| 00.00.1953 | Bridgehampton | 340 Mexico Spyder Vignale | 0228 AT | 1 | retired | |
| 08.03.1953 | Sports car Championship – 12h Sebring | 340 Mexico Spyder Vignale | 0228 AT | 8 | William Spear | retired |
| 21.02.1953 | 6h Mc Dill | 340 Mexico Spyder Vignale | 0228 AT | 2. | ||
| 12.04.1953 | Bergstrom | 340 Mexico Spyder Vignale | 0228 AT | 1. | ||
| 19.04.1953 | Pebble Beach | 340 Mexico Spyder Vignale | 0228 AT | 10 | 2. | |
| 05.07.1953 | 12h Reims | 340 MM | 0324 AM | other starters | ||
| 11.07.1953 | Silverstone | 340 MM | 0324 AM | 4. | ||
| 00.00.1952 | Bridgehampton | 340 America | 0118 A | 1. | ||
| 00.00.1952 | Road America | 340 America | 0118 A | retired | ||
| 00.00.1952 | Grand Island | 340 America | 0118 A | 1. | ||
| 28.02.1954 | Sports car Championship – 12h Sebring | 375 MM Spyder Pinin Farina | 0382 AM |
7
|
William Spear
|
retired
|
| 00.00.1954 | March Air Force Base | 375 MM Spyder Pinin Farina | 0382 AM | 4 | 1. | |
| 00.00.1954 | Andrews AFB | 375 MM Spyder Pinin Farina | 0382 AM | 1c | 1. | |
|
08.08.1954
|
SCCA National Sports Car Championships – Lockbourne
|
375 MM
|
1
|
William C. Spear
|
did not finish/rransmission
|
|
|
05.09.1954
|
Sports Car Championship – SCCA National Thompson
|
375 MM Spyder Pinin Farina | 0382 AM |
111
|
1. | |
| 00.00.1954 | Hunter AFB | 375 MM Spyder Pinin Farina | 0382 AM | 2. | ||
| 17.09.1954 | Watkins Glen | 375 MM Spyder Pinin Farina | 0382 AM | 100 | retired | |
| 07.03.1954 | 12h Sebring | 375 MM Spyder Pinin Farina | 0382 AM |
7
|
William Spear
|
retired |
| 17.09.1954 | Watkins Glen | 375 MM Spyder PF | 0382 AM | did not start | ||
| 00.00.1954 | Savanah | 4,5 | 2. |