Southwick fue el escenario de una nueva ronda del AMA Motocross 2019. Marvin Musquin fue el mejor en la categoría reina y el líder Eli Tomac se quedó a un paso del podio, aunque en el 250, Adam Cianciarulo sigue mostrándose muy fuerte y se llevó el gato al agua.
Así quedan las clasificaciones:
450
| 1 | Eli Tomac | Cortez, CO | 257 |
| 2 | Marvin Musquin | La Reole, France | 231 |
| 3 | Ken Roczen | Mattstedt, Germany | 229 |
| 4 | Zach Osborne | Abingdon, VA | 227 |
| 5 | Jason Anderson | Edgewood, NM | 212 |
| 6 | Cooper Webb | Newport, NC | 202 |
| 7 | Justin Barcia | Monroe, NY | 159 |
| 8 | Dean Ferris | Australia | 136 |
| 9 | Blake Baggett | Grand Terrace, CA | 131 |
| 10 | Justin Bogle | Cushing, OK | 117 |
| 11 | Fredrik Noren | Sweden | 111 |
| 12 | Cole Seely | Newbury Park, CA | 59 |
| 13 | Ben LaMay | Anchorage, AK | 56 |
| 14 | Lorenzo Locurcio | Venezuela | 55 |
| 15 | Joey Savatgy | Thomasville, GA | 54 |
| 16 | Justin Hill | Yoncalla, OR | 51 |
| 17 | Tyler Bowers | Danville, KY | 46 |
| 18 | Todd Waters | Australia | 46 |
| 19 | Benny Bloss | Oak Grove, MO | 39 |
| 20 | John Short | Pilot Point, TX | 36 |
| 21 | Henry Miller | Rochester, MN | 36 |
| 22 | Jake Masterpool | Paradise, TX | 35 |
| 23 | Toshiki Tomita | Kanazawa, Japan | 21 |
| 24 | Dylan Merriam | Corona, CA | 18 |
| 25 | James Weeks | Punta Gorda, FL | 13 |
250
| 1 | Adam Cianciarulo | Port Orange, FL | 269 |
| 2 | Justin Cooper | Cold Spring Harbor, NY | 246 |
| 3 | Dylan Ferrandis | Avignon, France | 232 |
| 4 | Colt Nichols | Muskogee, OK | 178 |
| 5 | Chase Sexton | La Moille, IL | 167 |
| 6 | R.J. Hampshire | Hudson, FL | 165 |
| 7 | Hunter Lawrence | Landsborough, Queensland, Australia | 162 |
| 8 | Michael Mosiman | Sebastopol, CA | 148 |
| 9 | Alex Martin | Millville, MN | 143 |
| 10 | Shane McElrath | Canton, NC | 108 |
| 11 | Ty Masterpool | Paradise, TX | 83 |
| 12 | Brandon Hartranft | Brick, NJ | 73 |
| 13 | Jacob Hayes | Greensboro, NC | 72 |
| 14 | Garrett Marchbanks | Coalville, UT | 63 |
| 15 | Cameron McAdoo | Sioux City, IA | 58 |
| 16 | Wilson Todd | Austrailia None | 56 |
| 17 | Martin Davalos | Quito, Ecuador | 54 |
| 18 | Derek Drake | San Luis Obispo, CA | 50 |
| 19 | Christian Craig | El Cajon, CA | 48 |
| 20 | Jordan Bailey | Orlando, FL | 48 |
| 21 | Jordon Smith | Belmont, NC | 38 |
| 22 | Kyle Peters | Greensboro, NC | 36 |
| 23 | Mitchell Oldenburg | Alvord, TX | 31 |
| 24 | Nick Gaines | Ringgold, GA | 30 |
| 25 | Pierce Brown | Sandy, UT | 18 |
