2021 Monster Energy AMA Supercross Championship
Arlington 1 (West) - 450SX Heat 1 Results
AT&T Stadium
Arlington, TX US 
March 13, 2021
450SX Heat 1 Results
| Rider | Time | Interval | Best Lap | Hometown | Bike | |
|---|---|---|---|---|---|---|
| 1 |  Jason Anderson | 10 Laps | 0:44.629 | Edgewood, NM  | Husqvarna FC 450 | |
| 2 |  Dean Wilson | +03.598 | 0:45.090 | Scotland  | Husqvarna FC 450 | |
| 3 |  Justin Barcia | +04.008 | 0:44.723 | Monroe, NY | GasGas MC 450F | |
| 4 |  Dylan Ferrandis | +04.947 | 0:44.839 | Avignon  | Yamaha YZ450F | |
| 5 |  Chase Sexton | +10.675 | 0:45.111 | La Moille, IL | Honda CRF450R | |
| 6 |  Justin Brayton | +14.191 | 0:45.794 | Fort Dodge, IA | Honda CRF450R | |
| 7 |  Ken Roczen | +19.064 | 0:44.868 | Mattstedt  | Honda CRF450R | |
| 8 |  Justin Bogle | +20.269 | 0:46.066 | Cushing, OK | KTM 450 SX-F | |
| 9 |  Kyle Chisholm | +21.668 | 0:46.332 | Clearwater, FL | Yamaha YZ450F | |
| 10 |  Brandon Hartranft | +23.661 | 0:46.444 | Brick, NJ | Suzuki RM-Z450 | |
| 11 |  Broc Tickle | +25.656 | 0:46.821 | Holly, MI | Honda CRF450R | |
| 12 |  Henry Miller | +31.695 | 0:47.127 | Rochester, MN | KTM 450 SX-F | |
| 13 |  Nick Schmidt | +36.399 | 0:47.318 | Maryville, WA | Husqvarna FC 450 | |
| 14 |  Kevin Moranz | +38.155 | 0:47.830 | Topeka, KS | KTM 450 SX-F | |
| 15 |  Scott Champion | +40.201 | 0:48.384 | Temecula, CA | Yamaha YZ450F | |
| 16 |  Alex Ray | +42.039 | 0:47.633 | Jackson, TN | Kawasaki KX450 | |
| 17 |  Joan Cros | +49.319 | 0:48.638 | Manlleu  | Kawasaki KX450 | |
| 18 |  AJ Catanzaro | 9 Laps | 0:48.726 | Portland, CT | Kawasaki KX450 | |
| 19 |  Vann Martin | 5 Laps | 0:50.016 | Houston, TX | Husqvarna FC 450 | |
| 20 |  Justin Starling | +DNF | Deland, FL | KTM 450 SX-F |
