2021 Monster Energy AMA Supercross Championship
Arlington 3 (West) - 450SX Main Event Results
AT&T Stadium
Arlington, TX US 
March 20, 2021
450SX Main Event Results
| Rider | Time | Interval | Best Lap | Hometown | Bike | |
|---|---|---|---|---|---|---|
| 1 |  Cooper Webb | 26 Laps | 0:48.757 | Newport, NC  | KTM 450 SX-F | |
| 2 |  Ken Roczen | +01.351 | 0:48.749 | Mattstedt  | Honda CRF450R | |
| 3 |  Eli Tomac | +03.434 | 0:48.576 | Cortez, CO | Kawasaki KX450 | |
| 4 |  Justin Barcia | +05.586 | 0:48.794 | Monroe, NY | GasGas MC 450F | |
| 5 |  Jason Anderson | +15.282 | 0:49.152 | Edgewood, NM | Husqvarna FC 450 | |
| 6 |  Malcolm Stewart | +30.449 | 0:49.672 | Haines City, FL | Yamaha YZ450F | |
| 7 |  Dylan Ferrandis | +31.399 | 0:49.588 | Avignon  | Yamaha YZ450F | |
| 8 |  Joey Savatgy | +33.465 | 0:49.786 | Thomasville, GA | KTM 450 SX-F | |
| 9 |  Aaron Plessinger | +36.393 | 0:49.839 | Hamilton, OH | Yamaha YZ450F | |
| 10 |  Dean Wilson | 25 Laps | 0:50.333 | Scotland  | Husqvarna FC 450 | |
| 11 |  Broc Tickle | +06.594 | 0:50.886 | Holly, MI | Honda CRF450R | |
| 12 |  Vince Friese | +14.660 | 0:50.516 | Cape Girardeau, MO | Honda CRF450R | |
| 13 |  Max Anstie | +27.149 | 0:51.192 | Newbury, England | Suzuki RM-Z450 | |
| 14 |  Mitchell Oldenburg | +31.896 | 0:51.768 | Alvord, TX | Honda CRF450R | |
| 15 |  Kyle Chisholm | +33.349 | 0:51.965 | Clearwater, FL | Yamaha YZ450F | |
| 16 |  Martin Davalos | 24 Laps | 0:51.446 | Quito  | KTM 450 SX-F | |
| 17 |  Justin Starling | 23 Laps | 0:54.218 | Deland, FL | KTM 450 SX-F | |
| 18 |  Brandon Hartranft | 21 Laps | 0:53.605 | Brick, NJ | Suzuki RM-Z450 | |
| 19 |  Alex Ray | 10 Laps | 0:52.887 | Jackson, TN | Kawasaki KX450 | |
| 20 |  Tyler Bowers | 5 Laps | 0:53.351 | Danville, KY | Kawasaki KX450 | |
| 21 |  Chase Sexton | 3 Laps | 0:49.714 | La Moille, IL | Honda CRF450R | |
| 22 |  Marvin Musquin | 2 Laps | 1:21.555 | La Reole | KTM 450 SX-F |
