| Name | Team | Event Name |
|---|---|---|
| Sian Owen-Cruise | WALT DISNEY WORLD Marathon Weekend | |
| Signe Engle | WALT DISNEY WORLD Marathon Weekend | |
| Sikandar Atiq | Bank of America Chicago Marathon | |
| Simon Politzer | Bank of America Chicago Marathon | |
| Simon Popkewitz | Madison Miles | Bank of America Chicago Marathon |
| Sister Sally Duffy | DIY: Your TEAM, Your Way | |
| Skye Gordon | WALT DISNEY WORLD Marathon Weekend | |
| Skylar McMahon | Team ChiLd | WALT DISNEY WORLD Marathon Weekend |
| Skylar O'Mara | TCS New York City Marathon | |
| Skylar Ronkin | TCS New York City Marathon |