Darlington #1 2021 Green Flag Speeds
| Rank | Driver | Finish | Green Flag Speed |
|---|---|---|---|
| 1 | Ross Chastain | 30 | 161.492 |
| 2 | Kyle Larson | 36 | 161.403 |
| 3 | Joey Logano | 1 | 161.344 |
| 4 | Tyler Reddick | 2 | 161.301 |
| 5 | Kyle Busch | 33 | 160.912 |
| 6 | Martin Truex Jr | 24 | 160.815 |
| 7 | William Byron | 13 | 160.614 |
| 8 | Christopher Bell | 6 | 160.58 |
| 9 | Ryan Blaney | 17 | 160.346 |
| 10 | Erik Jones | 25 | 160.302 |
| 11 | Bubba Wallace | 27 | 160.192 |
| 12 | Chase Elliott | 5 | 160.153 |
| 13 | Daniel Su?rez | 10 | 159.954 |
| 14 | Kevin Harvick | 4 | 159.87 |
| 15 | Kurt Busch | 28 | 159.724 |
| 16 | Denny Hamlin | 21 | 159.577 |
| 17 | Aric Almirola | 11 | 159.566 |
| 18 | Ricky Stenhouse Jr | 8 | 159.561 |
| 19 | Michael McDowell | 7 | 159.303 |
| 20 | Justin Haley | 3 | 159.179 |
| 21 | Austin Cindric | 18 | 159.121 |
| 22 | Austin Dillon | 9 | 159.09 |
| 23 | Alex Bowman | 29 | 159.041 |
| 24 | Ty Dillon | 12 | 158.906 |
| 25 | Chase Briscoe | 20 | 158.68 |
| 26 | Harrison Burton | 14 | 158.522 |
| 27 | Cole Custer | 26 | 158.367 |
| 28 | Brad Keselowski | 34 | 158.341 |
| 29 | Chris Buescher | 16 | 158.24 |
| 30 | Daniel Hemric | 31 | 157.951 |
| 31 | Todd Gilliland | 15 | 157.859 |
| 32 | Corey Lajoie | 35 | 157.714 |
| 33 | Landon Cassill | 22 | 157.409 |
| 34 | Cody Ware | 19 | 156.962 |
| 35 | JJ Yeley | 23 | 156.105 |
| 36 | BJ McLeod | 154.352 |
