450MX
| 1 | Eli | Tomac | Cortez, CO | Kawasaki | MONSTER ENERGY KAWASAKI |
| 2 | Cooper | Webb | Newport, NC | KTM | RED BULL KTM |
| 4 | Blake | Baggett | Grand Terrace, CA | KTM | Rocky Mountain ATV/MC - KTM - WPS |
| 14 | Cole | Seely | Newbury Park, CA | Honda | Team Honda HRC |
| 15 | Dean | Wilson | United Kingdom | Husqvarna | Rockstar Energy Husqvarna Factory Racing |
| 16 | Zachary | Osborne | Abingdon, VA | Husqvarna | Rockstar Energy Husqvarna Factory Racing |
| 17 | Joseph | Savatgy | Tallahassee, FL | Kawasaki | MONSTER ENERGY KAWASAKI |
| 21 | Jason | Anderson | Rio Rancho, NM | Husqvarna | Rockstar Energy Husqvarna Factory Racing |
| 25 | Marvin | Musquin | France | KTM | RED BULL KTM |
| 41 | Ben | LaMay | Wasilla, AK | Honda | TPJ Racing |
| 43 | Tyler | Bowers | Danville, KY | Kawasaki | Triggr | Tyler Bowers Racing |
| 46 | Justin | Hill | Yoncalla, OR | Suzuki | JGR | Yoshimura | Suzuki Factory Racing |
| 48 | Cody | Cooper | New Zealand | Honda | Enviro Dynamics | Crownkiwi |
| 49 | Henry | Miller | Rochester, MN | KTM | Triggr Racing |
| 51 | Justin | Barcia | Greenville, FL | Yamaha | Monster Energy-Factory Yamaha Racing |
| 56 | Lorenzo | Locurcio | Venezuela | Kawasaki | |
| 68 | Brandan | Leith | Eagle Mountain, UT | Husqvarna | Stewarts Heating Racing |
| 74 | Cade | Autenrieth | Hemet, CA | KTM | AM Motocross | SSI Decals |
| 82 | Justin | Hoeft | Castaic, CA | Yamaha | Simi Valley Cycles Yamaha |
| 85 | Dare | DeMartile | Lincoln, CA | Honda | Nemesis Performance |
| 94 | Ken | Roczen | Germany | Honda | Team Honda HRC |
| 101 | Fredrik | Noren | Sweden | Honda | Sustainable Oil Field Services | Honda |
| 103 | Dean | Ferris | Australia | Yamaha | Monster Energy Yamaha Factory Racing |
| 140 | Austin | Kouba | Boise, ID | Kawasaki | RMXSeries.com |
| 165 | Kris | Keefer | Hesperia, CA | Honda | |
| 169 | Dylan | Kappeler | Redwood City, CA | Husqvarna | Kappeler Construction, Inc. | Chilton Auto Body | Gilroy Motorcycle Center |
| 173 | Grant | Wall | Lodi, CA | Suzuki | Fly Racing | DT1 | Pirelli |
| 182 | Mason | Olson | Sparks, NV | KTM | |
| 195 | Keaton | Ward | Bozeman, MT | KTM | Ward Racing |
| 225 | Brett | Stralo | Valley Center, CA | Honda | Altitude Racing MX |
| 227 | Derek | Kelley | Riverside, CA | Honda | SLR Honda | Fly Racing | Flow Vision |
| 229 | Francisco | Martini | Escondido, CA | Yamaha | Martini Racing |
| 231 | Robert | Wilson | Vacaville, CA | KTM | Monty's Automotive |
| 234 | McCoy | Brough | Kaysville, UT | KTM | RMXSeries.com |
| 246 | Chance | Blackburn | Spokane, WA | Honda | Fusion Graphix | Devol | Epcon |
| 272 | Rory | Sullivan | White Salmon, WA | Kawasaki | Power Motorsports |
| 286 | Erki | Kahro | Estonia | KTM | MX Vacation |
| 292 | Kolton | Dean | West Jordan, UT | Yamaha | South Valley Motorsports | Fly Racing | Pro Taper |
| 309 | Jeremy | Smith | Marmora, NJ | Honda | Smith Racing |
| 314 | Tyler | Stepek | Mount Airy, MD | Yamaha | Tomahawk MX |
| 329 | Chad | Gores | Newport Beach, CA | KTM | TPJ Racing | California Coast Plumbers |
| 332 | Dustin | Winter | Clearwater, KS | Yamaha | EBR Performance |
| 335 | Jake | Masterpool | Paradise, TX | Honda | His 956 Facility |
| 383 | Casey | Brennan | Albuquerque, NM | KTM | Brennan Racing |
| 402 | Samuel | Greenawalt | Jacksonville, FL | Yamaha | Greenawalt Racing |
| 403 | Keylan | Meston | Canada | Yamaha | ClubMX | Traders | Redemption Yamaha |
| 444 | Caleb | Tennant | South Africa | KTM | Creative Sports Concepts | Parts Unlimited | TheWtrainingFacility |
| 446 | Blaine | Silveira | Lemoore, CA | Honda | TPJ | Fly Racing |
| 447 | Deven | Raper | Mesa, AZ | Kawasaki | RJC Racing | Kelly's Kawasaki |
| 477 | Todd | Waters | Australia | Husqvarna | Todd Waters Racing |
| 482 | Riley | Brough | Kaysville, UT | Honda | RMXSeries.com |
| 526 | Colton | Aeck | Simi Valley, CA | Honda | TREMX.com | Tri-County Powersports | Honda |
| 553 | Brent | Rouse | Torrance, CA | Honda | Patch Master Racing | Mid Cities Honda |
| 565 | Dominic | DeSimone | Las Vegas, NV | Honda | we1 Racing |
| 577 | Felix | Lopez | Mexico | KTM | |
| 588 | Kurt | Thomas | Las Vegas, NV | Honda | |
| 621 | RJ | Wageman | Newhall, CA | Honda | |
| 637 | Bobby | Piazza | Easton, PA | Honda | JMR Racing |
| 647 | Matthew | Hubert | Riverside, CA | Husqvarna | TPJ Fly Racing Team |
| 661 | Noah | Chambers | Oxford, PA | Kawasaki | SCCMX |
| 700 | James | Weeks | Punta Gorda, FL | Yamaha | TPJ Racing |
| 718 | Toshiki | Tomita | Japan | Honda | Team Honda HRC |
| 767 | Mason | Wharton | Brush Prairie, WA | Kawasaki | TPJ | Fly Racing |
| 841 | Jeff | Walker | Sylvania, OH | Husqvarna | Walker Motorsports |
| 845 | Bryan | O'Neil | Port Angeles, WA | Yamaha | O’Neil Racing |
| 876 | Chris | Alldredge | Redmond, OR | KTM | |
| 892 | Garret | Ioppolo | Lincoln, CA | Yamaha | Roseville Yamaha | Haesker Racing Engines |
| 909 | Jacob | Smith | Rescue, CA | Yamaha | Smith Racing |
| 917 | Drew | Thomas | Ione, CA | Yamaha | Roseville Yamaha | Haeseker Racing |
| 929 | Taiki | Koga | Japan | Kawasaki | TPJ Racing |ADA | SoCal MXTF |
| 934 | Brian | Medeiros | Koloa, HI | Husqvarna | Motocross Action Mag | Kauai Energy | Suzuki |
250MX
| 12 | Shane | McElrath | Canton, NC | KTM | Troy Lee Designs Red Bull KTM |
| 23 | Chase | Sexton | La Moille, IL | Honda | GEICO Honda AMSOIL Factory Connection |
| 26 | Alex | Martin | Millville, MN | Suzuki | JGR | Yoshimura | Suzuki Factory Racing |
| 28 | Jordon | Smith | Belmont, NC | KTM | Troy Lee Designs Red Bull KTM |
| 31 | RJ | Hampshire | Hudson, FL | Honda | GEICO Honda AMSOIL Factory Connection |
| 32 | Justin | Cooper | Cold Spring Harbor, NY | Yamaha | Monster Energy | Star Racing | Yamaha |
| 34 | Dylan | Ferrandis | France | Yamaha | Monster Energy | Star Racing | Yamaha |
| 36 | Michael | Mosiman | Sebastopol, CA | Husqvarna | Rockstar Energy Husqvarna Factory Racing |
| 38 | Christian | Craig | Corona, CA | Honda | GEICO Honda AMSOIL Factory Connection |
| 39 | Colt | Nichols | Muskogee, OK | Yamaha | Monster Energy | Star Racing | Yamaha |
| 45 | Brandon | Hartranft | Brick, NJ | Yamaha | Cycle Trader Rock River YAMAHA |
| 49 | Nick | Gaines | Ringgold, GA | Yamaha | Traders Racing | Yamaha |
| 52 | Jordan | Bailey | Orlando, FL | Husqvarna | Rockstar Energy Husqvarna Factory Racing |
| 61 | Garrett | Marchbanks | Coalville, UT | Kawasaki | MONSTER ENERGY | PRO CIRCUIT | KAWASAKI |
| 66 | Mitchell | Oldenburg | Alvord, TX | Yamaha | Monster Energy | Star Racing | Yamaha |
| 77 | Challen | Tennant | Willis, TX | KTM | 3D Racing |
| 83 | Killian | Auberson | Switzerland | KTM | |
| 92 | Adam | Cianciarulo | Clermont FL | Kawasaki | MONSTER ENERGY | PRO CIRCUIT | KAWASAKI |
| 110 | Yusuke | Watanabe | Japan | Yamaha | Cycle Trader Rock River YAMAHA |
| 112 | Thomas | Covington | Vernon, AL | Husqvarna | Rockstar Energy Husqvarna Factory Racing |
| 122 | Chris | Howell | Spokane, WA | Husqvarna | JMC Motorsports | Integrity Electric |
| 123 | Mitchell | Falk | Costa Mesa, CA | KTM | Troy Lee Designs Red Bull KTM |
| 139 | Nathen | LaPorte | Rothschild, WI | Honda | Sportland 2 | Precision Floors & Decor | LaPorte Racing |
| 153 | Carson | Carr | Escondido, CA | Yamaha | 365MX | Split Designs | Surface Sun Systems |
| 154 | Chase | Felong | Oceanside, CA | Yamaha | North County Yamaha | XPR Motorsports | Fox Racing |
| 156 | Jacob | Hayes | Greensboro,NC | Yamaha | Cycle Trader Rock River YAMAHA |
| 162 | Maxwell | Sanford | Pasadena, MD | Yamaha | Concrete Plants Inc |
| 168 | Cale | Kuchnicki | Alanson, MI | KTM | Highland Trails Racing |
| 186 | Tyler | Monks | Colorado Springs, CO | Husqvarna | Monks Construction Racing |
| 194 | Jerry | Robin | Hamel, MN | KTM | FCC Motosports | Signation |
| 196 | Hunter | Lawrence | Corona, CA | Honda | GEICO Honda AMSOIL Factory Connection |
| 205 | Todd | Wilson | Austrailia | Husqvarna | |
| 209 | Jared | Petruska | Canada | Honda | Bowcycle Yamaha |
| 232 | Dylan | Bolinger | Corona, CA | Husqvarna | AEO Powersports | MotoCutz | Fly Racing |
| 233 | Derek | Drake | San Luis Obispo, CA | KTM | Troy Lee Designs Red Bull KTM |
| 259 | Corbin | Hayes | Folsom, CA | Yamaha | TPJ Racing |
| 286 | Brandon | Sussman | Mission Viejo, CA | Yamaha | |
| 291 | Zane | Merrett | Crowley, TX | KTM | TPJ |
| 310 | Kai | Aiello | Temecula, CA | KTM | |
| 321 | Bradley | Lionnet | Zambia | Yamaha | |
| 345 | Joshua | Prior | Hebron, CT | Husqvarna | Custom MX Supply | American Ladders and Scaffolds | 6D |
| 356 | Daniel | Lippman | Fombell, PA | Husqvarna | TrueMX |
| 357 | Kameron | Barboa | Bosque Farms, NM | Yamaha | Bobby J’s Yamaha | Black Snout Brewhouse | Leatt |
| 407 | Benjamin | Nelko | Aliquippa, PA | Yamaha | 3D Racing | Yamaha |
| 427 | Deegan | Vonlossberg | Palmdale, CA | Yamaha | Grindstone Compound | Fasthouse | 100% |
| 461 | Thomas | Richards | Whitefish, MT | Suzuki | Poet Motorcycles |
| 554 | Wade | Brommel | Indianola, IA | Kawasaki | Real Ink Graphics | Cox Concrete | MX Tech |
| 583 | Corey | Ridel | East Hartland, CT | Husqvarna | RS Racing |
| 614 | Christopher | Shenoy | Soquel, CA | Husqvarna | |
| 842 | Joseph | Gerrior | Lincoln, CA | Honda | Back Pocket Racing |
| 898 | Jack | Fowler | Dallas, OR | Honda | Motosport Hillsboro | Fly Racing | Twisted Development |
| 906 | Adrian | Galamba | Bucyrus, KS | Kawasaki | |
| 916 | Jorge | Rubalcava | Paradise, TX | Honda | JR Racing |
| 923 | Chris | Moore | Nanuet, NY | Husqvarna | The Privateer Journey |
| 926 | Ciaran | Naran | Huntington Beach, CA | Husqvarna | |
| 936 | Ty | Masterpool | Paradise, TX | Yamaha | Monster Energy Yamalube Star Yamaha Racing |
| 964 | Mitchell | Goheen | Canada | Yamaha | Blackstock Motorsports | Glasstech Inc. |
| 974 | Brian | Marty | Olympia, WA | Husqvarna | Fusion Graphix | Motosport Hillsboro | FMF |
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