| « Nello Pagani | Drivers / 1950 / Reg Parnell | Johnnie Parsons » | |
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| Full name: | Parnell Reginald Harold Haslam |
| Nationality: | British |
| Date of Birth: | Sunday, 2 July 1911 |
| Place of birth: | Derby, England |
| Date of death: | Tuesday, 7 January 1964 |
| Age at death: | 52 years, 187 days (6 months, 5 days) |
| Debut: | 1950 British Grand Prix |
| Active years: | 1950 – 1952, 1954 (4) |
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| Rd | Date | Grand Prix | Constructor | Car | Grid | Race | Points | Champ. Points | Rank |
| 1 | 13 May | Great Britain | Alfa Romeo | 158 | 4 | 3 | 4 | 4 | 3 |
| 2 | 21 May | Monaco | 4 | 5 | |||||
| 3 | 30 May | Indy 500 | 4 | 7 | |||||
| 4 | 4 Jun | Switzerland | Maserati | 4CLT-48 | Np | 0 | 4 | 10 | |
| 5 | 18 Jun | Belgium | 4 | 10 | |||||
| 6 | 2 Jul | France | Maserati | 4CLT-48 | 11 | Ret | 0 | 4 | 10 |
| 7 | 3 Sep | Italy | Maserati | 4CLT-48 | Np | 0 | 4 | 11 |