| Teams 2019 Boyd Gaming 300 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 0 | JD Motorsports | Garrett Smithley | Chevrolet |
| 0 | Stewart Haas Racing | Cole Custer | Ford |
| 1 | JD Motorsports | Stephen Leicht | Chevrolet |
| 1 | JR Motorsports | Michael Annett | Chevrolet |
| 2 | Richard Childress Racing | Tyler Reddick | Chevrolet |
| 4 | JD Motorsports | Ross Chastain | Chevrolet |
| 5 | BJ McLeod Motorsports | Matt Mills | Toyota |
| 7 | JR Motorsports | Justin Allgaier | Chevrolet |
| 07 | SS Green Light Racing | Ray Black, Jr. | Chevrolet |
| 07 | SS Green Light Racing | Gray Gaulding | Chevrolet |
| 8 | JR Motorsports | Zane Smith | Chevrolet |
| 9 | JR Motorsports | Noah Gragson | Chevrolet |
| 10 | Kaulig Racing | Austin Dillon | Chevrolet |
| 11 | Kaulig Racing | Justin Haley | Chevrolet |
| 13 | MBM Motorsports / Garage 66 | Stan Mullis | Toyota |
| 15 | JD Motorsports | B.J. Mcleod | Chevrolet |
| 17 | Rick Ware Racing | Bayley Currey | Chevrolet |
| 18 | Joe Gibbs Racing | Kyle Busch | Toyota |
| 19 | Joe Gibbs Racing | Brandon Jones | Toyota |
| 20 | Joe Gibbs Racing | Christopher Bell | Toyota |
| 22 | Team Penske | Austin Cindric | Ford |
| 23 | GMS Racing | John H. Nemechek | Chevrolet |
| 35 | MBM Motorsports / Garage 66 | Joey Gase | Toyota |
| 36 | DGM Racing | Josh Williams | Chevrolet |
| 38 | RSS Racing | Jeff Green | Chevrolet |
| 39 | RSS Racing | Ryan Sieg | Chevrolet |
| 42 | MBM Motorsports / Garage 66 | Chad Finchum | Toyota |
| 51 | Jeremy Clements Racing | Jeremy Clements | Chevrolet |
| 52 | Jimmy Means Racing | David Starr | Chevrolet |
| 66 | MBM Motorsports / Garage 66 | Timmy Hill | Toyota |
| 74 | Mike Harmon Racing | Mike Harmon | Chevrolet |
| 78 | BJ McLeod Motorsports | Vinnie Miller | Toyota |
| 86 | Brandonbilt Motorsports | Brandon Brown | Chevrolet |
| 89 | Shepherd Racing Ventures | Morgan Shepherd | Chevrolet |
| 90 | DGM Racing | Donald Theetge | Chevrolet |
| 93 | RSS Racing | Josh Bilicki | Chevrolet |
| 98 | Biagi DenBeste Racing | Chase Briscoe | Ford |
| 99 | BJ McLeod Motorsports | Jario Avila, Jr. | Toyota |