Las Vegas #1 2023 Green Flag Speeds
| Rank | Driver | Finish Pos. | Green Flag Speed |
|---|---|---|---|
| 1 | William Byron | 1 | 177.209 |
| 2 | Kyle Larson | 2 | 177.2 |
| 3 | Alex Bowman | 3 | 176.7 |
| 4 | Martin Truex Jr | 7 | 176.665 |
| 5 | Denny Hamlin | 11 | 176.456 |
| 6 | Bubba Wallace | 4 | 176.342 |
| 7 | Christopher Bell | 5 | 176.263 |
| 8 | Ross Chastain | 12 | 176.258 |
| 9 | Kevin Harvick | 9 | 175.892 |
| 10 | Tyler Reddick | 15 | 175.892 |
| 11 | Daniel Suarez | 10 | 175.876 |
| 12 | Kyle Busch | 14 | 175.843 |
| 13 | Brad Keselowski | 17 | 175.738 |
| 14 | Ryan Blaney | 13 | 175.684 |
| 15 | Aric Almirola | 16 | 175.558 |
| 16 | Joey Logano | 36 | 175.429 |
| 17 | Justin Haley | 8 | 175.4 |
| 18 | Erik Jones | 19 | 175.316 |
| 19 | Austin Cindric | 6 | 175.169 |
| 20 | AJ Allmendinger | 18 | 175.064 |
| 21 | Michael McDowell | 25 | 175.02 |
| 22 | Ty Gibbs | 22 | 174.942 |
| 23 | Corey Lajoie | 20 | 174.657 |
| 24 | Ricky Stenhouse Jr | 24 | 174.644 |
| 25 | Chris Buescher | 21 | 174.633 |
| 26 | Austin Dillon | 27 | 174.535 |
| 27 | Ryan Preece | 23 | 174.43 |
| 28 | Josh Berry | 29 | 174.255 |
| 29 | Noah Gragson | 30 | 174.241 |
| 30 | Chase Briscoe | 28 | 173.848 |
| 31 | Harrison Burton | 26 | 173.583 |
| 32 | Todd Gilliland | 31 | 173.247 |
| 33 | Ty Dillon | 34 | 172.189 |
| 34 | JJ Yeley | 33 | 171.581 |
| 35 | BJ McLeod | 32 | 171.546 |
| 36 | Cody Ware | 35 | 167.311 |
