| Type: | CUST |
| Details Ref: | [1] [2] |
| Description: | Race 4 of 33 in the 2021 NASCAR Xfinity Series season |
| Race Name: | Alsco Uniforms 300 |
| Year: | 2021 |
| Location: | Las Vegas Motor Speedway in Las Vegas, Nevada |
| Course Mi: | 1.50 |
| Course Km: | 2.41 |
| Distance Laps: | 200 |
| Distance Mi: | 300 |
| Distance Km: | 482.8 |
| Avg: | 113.804 mph |
| Pole Driver: | Myatt Snider |
| Pole Team: | Richard Childress Racing |
| Grid From Prev Perf: | yes |
| Most Driver: | Daniel Hemric |
| Most Team: | Joe Gibbs Racing |
| Most Laps: | 74 |
| Car: | 16 |
| First Driver: | A. J. Allmendinger |
| First Team: | Kaulig Racing |
| Network: | FS1 |
| Announcers: | Adam Alexander, Kurt Busch, and Joey Logano |
The 2021 Alsco Uniforms 300 was a NASCAR Xfinity Series race held on March 6, 2021. It was contested over 200 laps on the 1.5miles oval. It was the fourth race of the 2021 NASCAR Xfinity Series season. Kaulig Racing driver A. J. Allmendinger collected his first win of the season.
Las Vegas Motor Speedway, located in Clark County, Nevada outside the Las Vegas city limits and about 15 miles northeast of the Las Vegas Strip, is a 1200acres complex of multiple tracks for motorsports racing. The complex is owned by Speedway Motorsports, Inc., which is headquartered in Charlotte, North Carolina.
Myatt Snider was awarded the pole for the race as determined by competition-based formula.[3] Jordan Anderson, Dillon Bassett, and Andy Lally did not have enough points to qualify for the race.
Stage OneLaps: 45
| Pos | Driver | Team | Manufacturer | Points | |
|---|---|---|---|---|---|
| 1 | 22 | Austin Cindric | Team Penske | Ford | 10 |
| 2 | 11 | Justin Haley | Kaulig Racing | Chevrolet | 9 |
| 3 | 18 | Daniel Hemric | Joe Gibbs Racing | Toyota | 8 |
| 4 | 16 | A. J. Allmendinger | Kaulig Racing | Chevrolet | 7 |
| 5 | 19 | Brandon Jones | Joe Gibbs Racing | Toyota | 6 |
| 6 | 1 | Michael Annett | JR Motorsports | Chevrolet | 5 |
| 7 | 7 | Justin Allgaier | JR Motorsports | Chevrolet | 4 |
| 8 | 9 | Noah Gragson | JR Motorsports | Chevrolet | 3 |
| 9 | 98 | Riley Herbst | Stewart-Haas Racing | Ford | 2 |
| 10 | 54 | Ty Dillon | Joe Gibbs Racing | Toyota | 1 |
| Pos | Driver | Team | Manufacturer | Points | |
|---|---|---|---|---|---|
| 1 | 18 | Daniel Hemric | Joe Gibbs Racing | Toyota | 10 |
| 2 | 2 | A. J. Allmendinger | Kaulig Racing | Chevrolet | 9 |
| 3 | 7 | Justin Allgaier | JR Motorsports | Chevrolet | 8 |
| 4 | 19 | Brandon Jones | Joe Gibbs Racing | Toyota | 7 |
| 5 | 02 | Brett Moffitt | Our Motorsports | Chevrolet | 6 |
| 6 | 1 | Michael Annett | JR Motorsports | Chevrolet | 5 |
| 7 | 9 | Noah Gragson | JR Motorsports | Chevrolet | 4 |
| 8 | 20 | Harrison Burton | Joe Gibbs Racing | Toyota | 3 |
| 9 | 68 | Brandon Brown | Brandonbilt Motorsports | Chevrolet | 2 |
| 10 | 22 | Austin Cindric | Joe Gibbs Racing | Ford | 1 |
Laps: 110
| Pos | Grid | Driver | Team | Manufacturer | Laps | Points | Status | |
|---|---|---|---|---|---|---|---|---|
| 1 | 10 | 16 | A. J. Allmendinger | Kaulig Racing | Chevrolet | 200 | 56 | Running |
| 2 | 3 | 18 | Daniel Hemric | Joe Gibbs Racing | Toyota | 200 | 53 | Running |
| 3 | 4 | 19 | Brandon Jones | Joe Gibbs Racing | Toyota | 200 | 47 | Running |
| 4 | 2 | 22 | Austin Cindric | Team Penske | Ford | 200 | 44 | Running |
| 5 | 34 | 9 | Noah Gragson | JR Motorsports | Chevrolet | 200 | 39 | Running |
| 6 | 13 | 1 | Michael Annett | JR Motorsports | Chevrolet | 200 | 41 | Running |
| 7 | 9 | 8 | Josh Berry (R) | JR Motorsports | Chevrolet | 200 | 30 | Running |
| 8 | 6 | 11 | Justin Haley | Kaulig Racing | Chevrolet | 200 | 38 | Running |
| 9 | 22 | 20 | Harrison Burton | Joe Gibbs Racing | Toyota | 200 | 31 | Running |
| 10 | 5 | 10 | Jeb Burton | Kaulig Racing | Chevrolet | 200 | 27 | Running |
| 11 | 25 | 68 | Brandon Brown | Brandonbilt Motorsports | Chevrolet | 200 | 28 | Running |
| 12 | 40 | 23 | Tyler Reddick (I) | Our Motorsports | Chevrolet | 200 | 0 | Running |
| 13 | 23 | 26 | Santino Ferrucci (R) | Sam Hunt Racing | Toyota | 200 | 24 | Running |
| 14 | 37 | 7 | Justin Allgaier | JR Motorsports | Chevrolet | 200 | 35 | Running |
| 15 | 21 | 44 | Tommy Joe Martins | Martins Motorsports | Chevrolet | 200 | 22 | Running |
| 16 | 24 | 92 | Josh Williams | DGM Racing | Chevrolet | 200 | 21 | Running |
| 17 | 8 | 51 | Jeremy Clements | Jeremy Clements Racing | Chevrolet | 199 | 20 | Running |
| 18 | 26 | 07 | Joe Graf Jr. | SS-Green Light Racing | Chevrolet | 199 | 19 | Running |
| 19 | 30 | 0 | Jeffrey Earnhardt | JD Motorsports | Chevrolet | 199 | 18 | Running |
| 20 | 38 | 15 | Colby Howard | JD Motorsports | Chevrolet | 199 | 17 | Running |
| 21 | 14 | 4 | Landon Cassill | JD Motorsports | Chevrolet | 199 | 16 | Running |
| 22 | 39 | 74 | Bayley Currey (I) | Mike Harmon Racing | Chevrolet | 199 | 15 | Running |
| 23 | 35 | 6 | Ryan Vargas (R) | JD Motorsports | Chevrolet | 199 | 14 | Running |
| 24 | 15 | 17 | Garrett Smithley | SS-Green Light Racing with Rick Ware Racing | Chevrolet | 199 | 13 | Running |
| 25 | 16 | 90 | Dexter Bean | DGM Racing | Chevrolet | 198 | 12 | Running |
| 26 | 32 | 78 | Jesse Little | B. J. McLeod Motorsports | Chevrolet | 198 | 11 | Running |
| 27 | 36 | 52 | Gray Gaulding | Means Motorsports | Chevrolet | 198 | 10 | Running |
| 28 | 29 | 61 | Chad Finchum | Hattori Racing Enterprises | Toyota | 198 | 9 | Running |
| 29 | 28 | 13 | David Starr | MBM Motorsports | Ford | 198 | 8 | Running |
| 30 | 27 | 48 | Jade Buford (R) | Big Machine Racing Team | Chevrolet | 196 | 7 | Running |
| 31 | 20 | 54 | Ty Dillon | Joe Gibbs Racing | Toyota | 195 | 7 | Running |
| 32 | 1 | 2 | Myatt Snider | Richard Childress Racing | Chevrolet | 191 | 5 | Running |
| 33 | 19 | 47 | Kyle Weatherman | Mike Harmon Racing | Chevrolet | 184 | 4 | Running |
| 34 | 7 | 02 | Brett Moffitt (I) | Our Motorsports | Chevrolet | 181 | 0 | Accident |
| 35 | 17 | 36 | Alex Labbe | DGM Racing | Chevrolet | 181 | 2 | Accident |
| 36 | 33 | 99 | Stefan Parsons | B. J. McLeod Motorsports | Chevrolet | 137 | 1 | Fuel Line |
| 37 | 18 | 66 | Timmy Hill | MBM Motorsports | Toyota | 100 | 1 | Engine |
| 38 | 11 | 39 | Ryan Sieg | RSS Racing | Chevrolet | 73 | 1 | Accident |
| 39 | 31 | 5 | Matt Mills | B. J. McLeod Motorsports | Chevrolet | 72 | 1 | Electrical |
| 40 | 12 | 98 | Riley Herbst | Stewart-Haas Racing | Ford | 56 | 3 | Accident |
| Official race results | ||||||||