| Crew Chiefs 2021 Alsco Uniforms 300 |
|---|
| No. | Crew Chief | Driver | Mfg |
|---|---|---|---|
| 0 | Jeffrey Earnhardt |  | |
| 1 | Michael Annett | | |
| 2 | Brett Moffitt | | |
| 2 | Myatt Snider | | |
| 4 | Ryan Vargas | | |
| 5 | Matt Mills | | |
| 6 | Landon Cassill | | |
| 7 | Justin Allgaier | | |
| 8 | Josh Berry | | |
| 9 | Noah Gragson | | |
| 10 | Jeb Burton | | |
| 11 | Justin Haley | | |
| 13 | Chad Finchum |  | |
| 15 | Colby Howard | | |
| 16 | AJ Allmendinger | | |
| 17 | Cody Ware | | |
| 18 | Daniel Hemric | | |
| 19 | Brandon Jones | | |
| 20 | Harrison Burton | | |
| 22 | Austin Cindric |  | |
| 23 | Ty Dillon | | |
| 26 | Grant Enfinger | | |
| 31 | Tyler Reddick | | |
| 36 | Alex Labbé | | |
| 39 | Ryan Sieg | | |
| 44 | Tommy Joe Martins | | |
| 48 | Jade Buford | | |
| 51 | Jeremy Clements | | |
| 54 | Ty Gibbs | | |
| 66 | Timmy Hill | | |
| 68 | Brandon Brown | | |
| 76 | Stefan Parsons | | |
| 78 | Jesse Little | | |
| 92 | Josh Williams | | |
| 98 | Riley Herbst | | |
| 99 | Chase Briscoe | |
