S
| Name | Seasons | World Championships | National Championships | Races | Wins |
|---|---|---|---|---|---|
| Alex Salvini | - | - | - | - | - |
| Donny Schmit | 1987-1995 | 125cc- 1990, 250cc- 1992 |
AMA 125cc West SX - 1986 | - | 15 |
| Fritz Schneider | - | - | - | - | 8 |
| Darrell Schultz | - | - | AMA 500cc- 1982 | - | - |
| Tommy Searle | 2006–present | - | - | - | - |
| Gary Semics | - | - | AMA 500cc SX - 1974 | - | - |
| Andrew Short | - | - | - | - | - |
| Shaun Simpson | - | - | - | - | - |
| Joël Smets | 1993-2005 | 500cc- 1995, 1997-1998, 2000, 650cc- 2003 |
- | - | 57 |
| Jeff Smith | 1955-1970 | 500cc- 1964-1965 | - | - | 30 |
| Marty Smith | 1974-1982 | - | AMA 125cc- 1974, 1975 AMA 500cc- 1977 |
- | - |
| Steve Stackable | - | - | AMA 500cc SX - 1975 | - | - |
| Jeff Stanton | 1986-1993 | - | AMA 250cc- 1989, 1990, 1992 AMA SX-1989, 1990, 1992 |
- | - |
| Rex Staten | - | 1981 Four Stroke World Champion | - | - | - |
| James Stewart Jr. | 2002–present | SX- 2006, 2007, 2009 | AMA 125cc- 2002, 2004 AMA SX- 2007, 2009 AMA Motocross- 2008 |
- | - |
| Brian Stonebridge | 1950 - 1959 | - | - | - | 6 |
| David Strijbos | 1985-1994 | 125cc- 1986 | - | - | 27 |
| Kevin Strijbos | 2006-2008 | - | - | - | 5 |
| Chuck Sun | - | - | AMA 500cc- 1980 | - | - |
| Torao Suzuki | - | - | All Japan 250cc- 1972 All-Japan 125cc- 1973, 1976 |
- | 4 |
| Gareth Swanepoel | - | - | - | - | - |
Read more about this topic: List Of Motocross Riders