2021 Monster Energy AMA Supercross Championship
Arlington 1 (West) - 450SX Main Event Results
AT&T Stadium
Arlington, TX US 
March 13, 2021
450SX Main Event Results
| Rider | Time | Interval | Best Lap | Hometown | Bike | |
|---|---|---|---|---|---|---|
| 1 |  Cooper Webb | 28 Laps | 0:44.902 | Newport, NC  | KTM 450 SX-F | |
| 2 |  Justin Barcia | +04.013 | 0:45.120 | Monroe, NY | GasGas MC 450F | |
| 3 |  Jason Anderson | +08.248 | 0:44.706 | Edgewood, NM | Husqvarna FC 450 | |
| 4 |  Chase Sexton | +12.539 | 0:45.135 | La Moille, IL | Honda CRF450R | |
| 5 |  Aaron Plessinger | +15.590 | 0:45.353 | Hamilton, OH | Yamaha YZ450F | |
| 6 |  Ken Roczen | +19.840 | 0:45.341 | Mattstedt  | Honda CRF450R | |
| 7 |  Joey Savatgy | +23.862 | 0:45.455 | Thomasville, GA | KTM 450 SX-F | |
| 8 |  Eli Tomac | +30.527 | 0:45.272 | Cortez, CO | Kawasaki KX450 | |
| 9 |  Dean Wilson | +34.253 | 0:45.285 | Scotland  | Husqvarna FC 450 | |
| 10 |  Martin Davalos | +38.003 | 0:45.591 | Quito  | KTM 450 SX-F | |
| 11 |  Vince Friese | +40.269 | 0:45.922 | Cape Girardeau, MO | Honda CRF450R | |
| 12 |  Justin Bogle | +43.219 | 0:46.333 | Cushing, OK | KTM 450 SX-F | |
| 13 |  Justin Brayton | 27 Laps | 0:45.939 | Fort Dodge, IA | Honda CRF450R | |
| 14 |  Malcolm Stewart | +12.337 | 0:45.574 | Haines City, FL | Yamaha YZ450F | |
| 15 |  Kyle Chisholm | +20.981 | 0:46.765 | Clearwater, FL | Yamaha YZ450F | |
| 16 |  Max Anstie | +43.187 | 0:46.959 | Newbury, England | Suzuki RM-Z450 | |
| 17 |  Alex Ray | 26 Laps | 0:47.335 | Jackson, TN | Kawasaki KX450 | |
| 18 |  Kevin Moranz | +09.508 | 0:48.333 | Topeka, KS | KTM 450 SX-F | |
| 19 |  Cade Clason | +15.499 | 0:48.101 | Arcadia, OH | Kawasaki KX450 | |
| 20 |  Benny Bloss | 25 Laps | 0:46.189 | Oak Grove, MO | Honda CRF450R | |
| 21 |  Scott Champion | 24 Laps | 0:48.021 | Temecula, CA | Yamaha YZ450F | |
| 22 |  Dylan Ferrandis | 7 Laps | 0:45.313 | Avignon  | Yamaha YZ450F |
