List of Grand Prix motorcycle racers: D
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| Name | Seasons | World Championships | MotoGP Wins | 500cc Wins | 350cc Wins | Moto2 Wins | 250cc Wins | Moto3 Wins | 125cc Wins | 80cc Wins | 50cc Wins | MotoE Wins |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Massimiliano d'Agnano |
1995 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
 Chris D'Aluisio |
1990-1994 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
 Luis D'Antin |
1989, 1992-1998 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
 Jehan d'Orgeix |
1993 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
 Gerard Daalhuizen |
? | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Julien Da Costa |
1999-2000 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Patrick Dadier |
? | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
 Willy Dafflon |
? | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
 Kasma Daniel |
2017, 2020, 2022-2023 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
 Harold Daniell |
1949-1950 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Hakim Danish |
2025- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Chaz Davies |
2002-2007, 2024 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Raffaele De Rosa |
2004-2011 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Alex Debón |
2004-2011 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
 Ernst Degner |
1957-1966 | 1 50cc - 1962 |
0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 7 | 0 |
| Noah Dettwiler |
2023-2025 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Fabio Di Giannantonio |
2015- | 0 | 1 | 0 | 0 | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
| Barry Ditchburn |
1977, 1979 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Jake Dixon |
2017, 2019-2025 | 0 | 0 | 0 | 0 | 7 | 0 | 0 | 0 | 0 | 0 | 0 |
 Mick Doohan |
1989-1999 | 5 500cc - 1994-1998 |
0 | 54 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Scott Doohan |
1994 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Cees Doorakkers |
1984-1995 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| William Doran |
1949, 1951-1953, 1991 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Stefan Dörflinger |
1973-1990 | 4 80cc - 1984-1985 50cc - 1982-1983 |
0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 9 | 0 |
| Andrea Dovizioso |
2001-2022 | 1 125cc - 2004 |
15 | 0 | 0 | 0 | 4 | 0 | 5 | 0 | 0 | 0 |
 János Drapál |
1969-1973, 1976-1977, 1980-1981 | 0 | 0 | 0 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Mike Duff |
1961-1967 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 0 | 0 |
| Geoff Duke |
1950-1959 | 6 500cc - 1951, 1953-1955 350cc - 1951-1952 |
0 | 22 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Jason Dupasquier |
2020-2021 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |