2021 Truck Series Playoffs
World Wide Technology Raceway at Gateway will return to host the start of the Playoffs (August 20). Two historic short tracks will determine which drivers continue their Playoffs run, as Bristol Motor Speedway (Sept. 16) trims the field to eight and Martinsville Speedway (Oct. 30) decides which four drivers will race for a championship at Phoenix Raceway (Nov. 5).
—NASCAR—
- Round of 10: World Wide Technology Raceway at Gateway, Canadian Tire Motorsports Park, and Bristol Motor Speedway
- Round of 8: Las Vegas Motor Speedway, Talladega Superspeedway, and Martinsville Speedway
- Championship 4: Phoenix Raceway
| RACE | TRACK | WINNER |
| 1 | Daytona International Speedway | #99-Ben Rhodes |
| 2 | Daytona International Speedway Road Course | #99-Ben Rhodes |
| 3 | Las Vegas Motor Speedway | #4-John Hunter Nemechek |
| 4 | Atlanta Motor Speedway | #51-Kyle Busch (ineligible) |
| 5 | Bristol Motor Speedway | #51-Martin Truex, Jr. (ineligible) |
| 6 | Richmond Raceway | |
| 7 | Kansas Speedway | |
| 8 | Darlington Raceway | |
| 9 | Circuit of the Americas | |
| 10 | Charlotte Motor Speedway | |
| 11 | Texas Motor Speedway | |
| 12 | Nashville Superspeedway | |
| 13 | Pocono Raceway | |
| 14 | Knoxville Raceway | |
| 15 | Watkins Glen International | |
| ROUND OF 10 | ||
| 16 | World Wide Technology Raceway at Gateway | |
| 17 | Canadian Tire Motorsports Park | |
| 18 | Bristol Motor Speedway | |
| ROUND OF 8 | ||
| 19 | Las Vegas Motor Speedway | |
| 20 | Talladega Superspeedway | |
| 21 | Martinsville Speedway | |
| ROUND OF 4 – CHAMPIONSHIP RACE | ||
| 22 | Phoenix Raceway |