| Teams 2021 Autotrader EchoPark Automotive 500 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 0 | StarCom Racing | Quin Houff | Chevrolet |
| 1 | Chip Ganassi Racing | Kurt Busch | Chevrolet |
| 2 | Team Penske | Brad Keselowski | Ford |
| 3 | Richard Childress Racing | Austin Dillon | Chevrolet |
| 4 | Stewart Haas Racing | Kevin Harvick | Ford |
| 5 | Hendrick Motorsports | Kyle Larson | Chevrolet |
| 6 | Roush Fenway Racing | Ryan Newman | Ford |
| 7 | Spire Motorsports | Corey LaJoie | Chevrolet |
| 8 | Richard Childress Racing | Tyler Reddick | Chevrolet |
| 9 | Hendrick Motorsports | Chase Elliott | Chevrolet |
| 10 | Stewart Haas Racing | Aric Almirola | Ford |
| 11 | Joe Gibbs Racing | Denny Hamlin | Toyota |
| 12 | Team Penske | Ryan Blaney | Ford |
| 13 | MBM Motorsports / Garage 66 | Timmy Hill | Toyota |
| 14 | Stewart Haas Racing | Chase Briscoe | Ford |
| 15 | Rick Ware Racing | Garrett Smithley | Chevrolet |
| 17 | Roush Fenway Racing | Chris Buescher | Ford |
| 18 | Joe Gibbs Racing | Kyle Busch | Toyota |
| 19 | Joe Gibbs Racing | Martin Truex, Jr. | Toyota |
| 20 | Joe Gibbs Racing | Christopher Bell | Toyota |
| 21 | Wood Brothers Racing | Matt DiBenedetto | Ford |
| 22 | Team Penske | Joey Logano | Ford |
| 23 | 23XI Racing | Bubba Wallace | Toyota |
| 24 | Hendrick Motorsports | William Byron | Chevrolet |
| 34 | Front Row Motorsports | Michael McDowell | Ford |
| 37 | JTG Daughtery Racing | Ryan Preece | Chevrolet |
| 38 | Front Row Motorsports | Anthony Alfredo | Ford |
| 41 | Stewart Haas Racing | Cole Custer | Ford |
| 42 | Chip Ganassi Racing | Ross Chastain | Chevrolet |
| 43 | Richard Petty Motorsports | Erik Jones | Chevrolet |
| 47 | JTG Daughtery Racing | Ricky Stenhouse, Jr. | Chevrolet |
| 48 | Hendrick Motorsports | Alex Bowman | Chevrolet |
| 51 | Rick Ware Racing | Cody Ware | Chevrolet |
| 52 | Rick Ware Racing | Josh Bilicki | Ford |
| 53 | Rick Ware Racing | Joey Gase | Chevrolet |
| 66 | MBM Motorsports / Garage 66 | David Starr | Ford |
| 77 | Spire Motorsports | Justin Haley | Chevrolet |
| 78 | Live Fast Motorsports | B.J. McLeod | Ford |
| 99 | Trackhouse Racing | Daniel Suarez | Chevrolet |