Dillon wins Xfinity Vegas pole
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| Austin Dillon |
With a lap of 184.322 mph, Austin Dillon has won pole position for today's Boyd Gaming 300 at Las Vegas Motor Speedway. Dillon's Richard Childress Racing teammate Brian Scott was second with Erik Jones, Ryan Blaney and Brendan Gaughan rounding out the top-five.
NASCAR Sprint Cup start Dale Earnhardt, Jr. was sixth in the #88 JR Motorsports Chevy. Regan Smith, Chase Elliott, Aric Almirola and Chris Buescher rounded out the top-10.
The green flag is scheduled for 4:16 p.m. ET with television coverage on Fox Sports 1. Starting lineup below.
| POS. | Car # | Driver | Sponsor | Best Speed | Best Time | Behind |
| 1 | 33 | Austin Dillon | Rheem | 184.332 | 29.295 | Leader |
| 2 | 2 | Brian Scott | Albertsons / Sanderson Farms | 182.753 | 29.548 | –0.253 |
| 3 | 20 | Erik Jones | Interstate Batteries | 182.636 | 29.567 | –0.272 |
| 4 | 22 | Ryan Blaney | Discount Tire | 182.432 | 29.600 | –0.305 |
| 5 | 62 | Brendan Gaughan | South Point | 182.359 | 29.612 | –0.317 |
| 6 | 88 | Dale Earnhardt Jr | Taxslayer.com | 181.464 | 29.758 | –0.463 |
| 7 | 7 | Regan Smith | Great Clips | 181.427 | 29.764 | –0.469 |
| 8 | 9 | Chase Elliott | NAPA Auto Parts | 181.385 | 29.771 | –0.476 |
| 9 | 98 | Aric Almirola | Carroll Shelby Engine Co | 181.311 | 29.783 | –0.488 |
| 10 | 60 | Chris Buescher | Roush Performance Products Ford Mustang | 181.269 | 29.790 | –0.495 |
| 11 | 54 | Denny Hamlin | Monster Energy | 181.105 | 29.817 | –0.522 |
| 12 | 6 | Darrell Wallace Jr | Ford Ecoboost Ford Mustang | 180.542 | 29.910 | –0.615 |
| 13 | 1 | Elliott Sadler | OneMain Financial Ford Mustang | 180.844 | 29.860 | –0.565 |
| 14 | 39 | Ryan Sieg | Uncle Bob's Self Storage | 180.662 | 29.890 | –0.595 |
| 15 | 18 | Daniel Suarez | Arris | 180.524 | 29.913 | –0.618 |
| 16 | 42 | Brennan Poole | DC Solar | 180.439 | 29.927 | –0.632 |
| 17 | 19 | Mike Bliss | TBD | 180.379 | 29.937 | –0.642 |
| 18 | 16 | Ryan Reed | Lilly- American Diabetes Association Ford Mustang | 180.270 | 29.955 | –0.660 |
| 19 | 8 | Blake Koch | LeafFilter-Gutter Protection | 180.120 | 29.980 | –0.685 |
| 20 | 3 | Ty Dillon | Red Kap / Prudential Overall Supply | 180.114 | 29.981 | –0.686 |
| 21 | 25 | John Wes Townley | Zaxby's | 179.247 | 30.126 | –0.831 |
| 22 | 01 | Landon Cassill | G&K Services | 179.229 | 30.129 | –0.834 |
| 23 | 43 | Dakoda Armstrong | WinField | 179.027 | 30.163 | –0.868 |
| 24 | 24 | Eric McClure | HEFTY REYNOLDS WRAP | 177.854 | 30.362 | –1.067 |
| 25 | 51 | Jeremy Clements | RepairableVehicles.com | 177.918 | 30.351 | –1.056 |
| 26 | 55 | Jamie Dick | Viva Auto Group | 177.655 | 30.396 | –1.101 |
| 27 | 28 | J.J. Yeley | Texas 28 Spirits Stage | 177.416 | 30.437 | –1.142 |
| 28 | 14 | Cale Conley | TBD | 176.910 | 30.524 | –1.229 |
| 29 | 0 | Harrison Rhodes | teamjdmotorsports.com | 176.574 | 30.582 | –1.287 |
| 30 | 40 | Carl Long | Braille Battery/Grafoid | 174.899 | 30.875 | –1.580 |
| 31 | 44 | David Starr | Zachry | 174.820 | 30.889 | –1.594 |
| 32 | 90 | Mario Gosselin | TBA | 173.980 | 31.038 | –1.743 |
| 33 | 13 | Derek White | Braille Battery/Grafoid | 173.907 | 31.051 | –1.756 |
| 34 | 10 | Jeff Green | TriStar Motorsports | 171.964 | 31.402 | –2.107 |
| 35 | 52 | Joey Gase | TBA | 171.958 | 31.403 | –2.108 |
| 36 | 70 | Derrike Cope | Charlie's Soap | 171.953 | 31.404 | –2.109 |
| 37 | 74 | Mike Harmon | TBA | 171.385 | 31.508 | –2.213 |
| 38 | 4 | Ross Chastain | teamjdmotorsports.com | 171.189 | 31.544 | –2.249 |
| 39 | 89 | Morgan Shepherd | Courtney Construction | 169.258 | 31.904 | –2.609 |
| 40 | 15 | Cody Ware | RWR | 168.850 | 31.981 | –2.686 |