M
| Name | Seasons | World Championships | National Championships | Races | Wins |
|---|---|---|---|---|---|
| Billy MacKenzie | - | - | - | - | - |
| Corrado Maddii | - | - | - | - | 5 |
| André Malherbe | 1973-1986 | 500cc- 1980, 1981, 1983 | - | - | 41 |
| Paul Malin | - | - | - | - | 2 |
| Jacky Martens | 1984-1997 | 500cc- 1993 | - | - | 17 |
| Christophe Martin | - | - | - | - | - |
| Mickael Maschio | - | 125cc- 2002 | - | - | 8 |
| Connor McGechan | 2000–present | 50cc-2000,2001,2003,2004,2005 | Aus. 500cc- 2001, 2003, 2004 | ||
| Jeremy McGrath | 1989-2003 | AMA 250cc- 1995 AMA SX 1993-1996, 1998-2000 |
- | - | |
| Andrew McFarlane | - | - | - | - | 4 |
| Brett Metcalfe | - | - | - | - | - |
| Heikki Mikkola | 1969-1979 | 500cc- 1974, 1977, 1978 250cc- 1976 |
- | - | 34 |
| David Millsaps | - | - | - | - | - |
| Auguste Mingels | - | - | - | - | 7 |
| Marty Moates | 1976-1984 | - | - | - | 1 |
| Guennady Moisseev | - | 250cc- 1974, 1977, 1978 | - | - | 14 |
| Bobby Moore | 1980-1995 | 125cc - 1994 | AMA 125cc West SX - 1985 | - | 13 |
| Blair Morgan | 1993-2008 | Can. 125/250cc- 1997, 1999 | - | - | |
| Gaylon Mosier | - | - | - | - | - |
| Marvin Musquin | 2008- | MX2- 2009, 2010 | - | - | - |
| Brian Myerscough | - | 1985 Four Stroke World Champion | - | - | - |
Read more about this topic: List Of Motocross Riders