450
| # | First Name | Last Name | Birth Place | Class | Brand | Model |
| 5 | Ryan | Dungey | Waconia, MN | 450 | KTM | 450 SX-F |
| 7 | James | Stewart | Haines City, FL | 450 | Suzuki | RMZ 450 |
| 10 | Justin | Brayton | Fort Dodge, IA | 450 | Honda | CRF450R |
| 11 | Kyle | Chisholm | Clearwater, FL | 450 | Kawasaki | KX 450F |
| 18 | Davi | Millsaps | Orlando, FL | 450 | Yamaha | YZ 450F |
| 21 | Jacob | Weimer | Twin Falls, ID | 450 | Kawasaki | KX 450F |
| 24 | Brett | Metcalfe | Australia | 450 | Suzuki | RMZ 450 |
| 25 | Broc | Tickle | Holly, MI | 450 | Kawasaki | KX 450F |
| 26 | Michael | Byrne | Australia | 450 | Suzuki | RMZ 450 |
| 28 | Tyla | Rattray | South Africa | 450 | Kawasaki | KX 450F |
| 29 | Andrew | Short | Colorado Springs, CO | 450 | Honda | CRF450R |
| 32 | Tommy | Hahn | Great Bend, KS | 450 | Honda | CRF450R |
| 33 | Josh | Grant | Riverside, CA | 450 | Kawasaki | KX 450F |
| 36 | Kyle | Regal | Kemp, TX | 450 | Yamaha | YZ 450F |
| 45 | Nick | Paluzzi | Riverside, CA | 450 | Kawasaki | KX 450F |
| 46 | Les | Smith | York, SC | 450 | KTM | 450 SX-F |
| 48 | Jimmy | Albertson | Ozark, MO | 450 | Suzuki | RMZ 450 |
| 50 | Nico | Izzi | Rochester, MI | 450 | Yamaha | YZ 450F |
| 52 | Ben | LaMay | Wasilla, AK | 450 | Yamaha | YZ 450F |
| 53 | Ryan | Sipes | Vine Grove, KY | 450 | Yamaha | YZ 450F |
| 59 | Vince | Friese | Cape Girardeon, MO | 450 | Suzuki | RMZ 450 |
| 60 | Mathew | Lemoine | Baton Rouge, LA | 450 | Kawasaki | KX 450F |
| 61 | Austin | Howell | Red Bluff, CA | 450 | Suzuki | RMZ 450 |
| 66 | Jason | Thomas | Melrose, FL | 450 | Suzuki | RMZ 450 |
| 68 | Shane | Sewell | Westville, IN | 450 | KTM | 450 SX-F |
| 71 | Kevin | Rookstool | Klamath Falls, OR | 450 | Honda | CRF450R |
| 82 | Justin | Sipes | Vine Grove, KY | 450 | Kawasaki | KX 450F |
| 91 | Dalton | Carlson | Dayton, MN | 450 | Yamaha | YZ 450F |
| 98 | Tye | Hames | Palmdale, CA | 450 | Yamaha | YZ 450F |
| 135 | Robert | Fitch, Jr. | Littleton, CO | 450 | KTM | 450 SX-F |
| 160 | Cole | Thompson | Canada | 450 | Honda | CRF450R |
| 180 | Doug | Leavitt | Littleton, Colorado | 450 | Honda | CRF450R |
| 186 | Sean | Borkenhagen | Huntington Beach, CA | 450 | Kawasaki | KX 450F |
| 207 | Sean | Collier | Valencia, CA | 450 | Honda | CRF450R |
| 220 | Todd | Bannister | Colorado Springs, CO | 450 | Honda | CRF450R |
| 224 | Heath | Harrison | Pensacola, FL | 450 | Honda | CRF450R |
| 226 | Devin | Brassfield | Denver, CO | 450 | Kawasaki | KX 450F |
| 227 | Cole | Martinez | Rimrock, AZ | 450 | Kawasaki | KX 450F |
| 232 | Billy | Laninovich | Temecula, CA | 450 | Honda | CRF450R |
| 241 | Derek | Anderson | Arvada, CO | 450 | Kawasaki | KX 450F |
| 268 | Bryce | Shondeck | Colorado Springs, CO | 450 | KTM | 350 SX-F |
| 303 | Carlos | Gonzalez | Riverside, CA | 450 | Suzuki | RMZ 450 |
| 370 | Drew | Yenerich | New Lenox, IL | 450 | Yamaha | YZ 450F |
| 389 | Christopher | See | Calabasas, CA | 450 | Honda | CRF450R |
| 400 | Trevor | Ivey | Kennewick, WA | 450 | Yamaha | YZ 450F |
| 409 | Dillon | Huddleston | Desert Hills, AZ | 450 | Kawasaki | KX 450F |
| 440 | Lee | Witt | San Jose, CA | 450 | Yamaha | YZ 450F |
| 449 | Dakota | Kessler | Wall, NJ | 450 | Honda | CRF450R |
| 459 | Conrad | Weiland | La Mesa, CA | 450 | Honda | CRF450R |
| 481 | Sergey | Astaykin | Russia | 450 | Honda | CRF450R |
| 505 | Sean | Lipanovich | Guam | 450 | Yamaha | YZ 450F |
| 550 | Beau | Bentley | Terrell, TX | 450 | Yamaha | YZ 450F |
| 554 | Tyler | Livesay | Atlanta, GA | 450 | Kawasaki | KX 450F |
| 565 | Preston | Mull | Modesto, CA | 450 | Honda | CRF450R |
| 580 | Roberto | Castro | San Jose | 450 | Kawasaki | KX 450F |
| 589 | Joey | Olson | Wheat Ridge, CO | 450 | Yamaha | YZ 450F |
| 595 | Evgeny | Mikhaylov | Russia | 450 | Suzuki | RMZ 450 |
| 636 | Keith | Knight | Carmichael, CA | 450 | Suzuki | RMZ 450 |
| 651 | Cody | Nobles | Denver, CO | 450 | Yamaha | YZ 450F |
| 652 | Dustin | Pipes | Fresno, CA | 450 | Suzuki | RMZ 450 |
| 659 | Justin | Freund | St. Louis, MO | 450 | Kawasaki | KX 450F |
| 671 | Todd | Caldwell Jr | Laguna Hills, CA | 450 | Kawasaki | KX 450F |
| 676 | Jeremy | Johnson | Chandler, AZ | 450 | Kawasaki | KX 450F |
| 685 | Bret | Pike | Pueblo, CO | 450 | KTM | 450 SX-F |
| 693 | Tucker | Saye | Littleton, CO | 450 | Suzuki | RMZ 450 |
| 702 | Cameron | Stone | Chattanooga, TN | 450 | Kawasaki | KX 450F |
| 707 | Alexander | Millican | Dallas, TX | 450 | Honda | CRF450R |
| 713 | Chad | Cook | Oklahoma City, OK | 450 | Kawasaki | KX 450F |
| 735 | Travis | Pitt | Susanville, CA | 450 | Kawasaki | KX 450F |
| 753 | Derek | Brewster | Denver, CO | 450 | Honda | CRF450R |
| 763 | Corey | Ahl | 450 | Honda | CRF450R | |
| 765 | Michael | Giese | Denver, CO | 450 | Yamaha | YZ 450F |
| 768 | Cole | Shondeck | Colorado Springs, CO | 450 | Kawasaki | KX 450F |
| 790 | Robert | Imondi | Glenwood, CO | 450 | Suzuki | RMZ 450 |
| 792 | Bracken | Hall | Roosevelt, UT | 450 | Honda | CRF450R |
| 800 | Mike | Alessi | Victorville, CA | 450 | Suzuki | RMZ 450 |
| 816 | Rustin | Meyer | Colorado Springs, CO | 450 | Kawasaki | KX 450F |
| 817 | Dustin | Pulliam | Lancaster, CA | 450 | Honda | CRF450R |
| 845 | Brandon | Glenn | Dallas, TX | 450 | Kawasaki | KX 450F |
| 866 | Rickard | Sandberg | Perris, CA | 450 | Honda | CRF450R |
| 869 | Robert | Lind | Perris, CA | 450 | Honda | CRF450R |
| 880 | Canaan | Barrilleaux | Palestine, TX | 450 | KTM | 450 SX-F |
| 888 | Hunter | Meyer | Colorado Springs, CO | 450 | Kawasaki | KX 450F |
| 897 | Blake | Ballard | Lodi, CA | 450 | Kawasaki | KX 450F |
| 917 | Drew | Thomas | Ione, CA | 450 | Kawasaki | KX 450F |
| 945 | Michael | Stryker | New Paltz, NY | 450 | KTM | 450 SX-F |
| 975 | Jake | Loberg | Ham Lake, MN | 450 | Kawasaki | KX 450F |
| 976 | Joshua | Greco | Olivehurst, CA | 450 | Honda | CRF450R |
250
| # | First Name | Last Name | Birth Place | Class | Brand | Model |
| 1 | Dean | Wilson | Scotland | 250 | Kawasaki | KX 250F |
| 9 | Ivan | Tedesco | Murrieta, CA | 250 | Kawasaki | KX 250F |
| 12 | Blake | Baggett | Grand Terrace, CA | 250 | Kawasaki | KX 250F |
| 17 | Eli | Tomac | Cortez, CO | 250 | Honda | CRF250R |
| 19 | Kyle | Cunningham | Aledo, TX | 250 | Yamaha | YZ 250F |
| 20 | Justin | Barcia | Monroe, NY | 250 | Honda | CRF250R |
| 23 | Gareth | Swanepoel | South Africa | 250 | Yamaha | YZ 250F |
| 30 | Alex | Martin | Millville, MN | 250 | Honda | CRF250R |
| 31 | Martin | Davalos | Ecuador | 250 | Suzuki | RMZ 250 |
| 35 | Darryn | Durham | Butler, PA | 250 | Kawasaki | KX 250F |
| 37 | Malcolm | Stewart | Haines City, FL | 250 | KTM | 250 SX-F |
| 38 | Marvin | Musquin | France | 250 | KTM | 250 SX-F |
| 44 | Jason | Anderson | Edgewood, NM | 250 | Suzuki | RMZ 250 |
| 49 | Justin | Bogle | Cushing, OK | 250 | Honda | CRF250R |
| 51 | Travis | Baker | Temecula, CA | 250 | Honda | CRF250R |
| 57 | Jake | Canada | Sun City, CA | 250 | Honda | CRF250R |
| 58 | William | Hahn | Wichita, KS | 250 | Honda | CRF250R |
| 67 | Scott | Champion | Temecula, CA | 250 | Honda | CRF250R |
| 70 | Ken | Roczen | Germany | 250 | KTM | 250 SX-F |
| 84 | Kellian | Rusk | Durango, CO | 250 | Honda | CRF250R |
| 93 | AJ | Catanzaro | Middletown, CT | 250 | KTM | 250 SX-F |
| 126 | Hunter | Hewitt | Irving, TX | 250 | Suzuki | RMZ 250 |
| 133 | Myles | Tedder | Upland, CA | 250 | Kawasaki | KX 250F |
| 136 | Jessy | Nelson | Paso Robles, CA | 250 | Honda | CRF250R |
| 162 | Mason | Hume | 250 | Kawasaki | KX 250F | |
| 166 | Dakota | Tedder | Surfside, CA | 250 | Kawasaki | KX 250F |
| 211 | Tevin | Tapia | Bonney Lake, WA | 250 | KTM | 250 SX-F |
| 244 | Ryan | Zimmer | Raleigh, NC | 250 | Honda | CRF250R |
| 246 | Mike | Henderson | Littleton, CO | 250 | Kawasaki | KX 250F |
| 278 | Parker | Anthony | Americus, GA | 250 | Kawasaki | KX 250F |
| 296 | Trevor | Whitmarsh | 250 | Yamaha | YZ 250F | |
| 328 | Chad | Crawford | Warrenton, MO | 250 | Kawasaki | KX 250F |
| 404 | Zack | Freeberg | Riverview, FL | 250 | KTM | 250 SX-F |
| 423 | Brandon | Gillespie | Palmdale, CA | 250 | Suzuki | RMZ 250 |
| 529 | Tylor | Hemme | Lancaster, CA | 250 | Suzuki | RMZ 250 |
| 535 | Joey | Peters | Asbury, NJ | 250 | Yamaha | YZ 250F |
| 536 | Erick | Meusling | Newberg, OR | 250 | Honda | CRF250R |
| 558 | Dylan | Slusser | Uniontown, pa | 250 | Honda | CRF250R |
| 566 | Logan | Martin | Fairmont, WV | 250 | Honda | CRF250R |
| 569 | Dylan | Ziolkowski | Hatley, WI | 250 | Honda | CRF250R |
| 608 | David | Pulley Jr | Lake Elsinore, CA | 250 | Yamaha | YZ 250F |
| 629 | Shawn | Pickett | Scottsbluff, NE | 250 | Suzuki | RMZ 250 |
| 631 | Ignacio | Pazos | Costa Rica | 250 | Honda | CRF250R |
| 634 | Eric | Senk | Lansing, MI | 250 | Kawasaki | KX 250F |
| 644 | Garret | Eckman | Tustin, CA | 250 | Kawasaki | KX 250F |
| 655 | John | Pauk | Houston, TX | 250 | Kawasaki | KX 250F |
| 670 | Dylan | Schmoke | Alpine, CA | 250 | Kawasaki | KX 250F |
| 696 | Tyler | Granger | Lancaster, CA | 250 | Kawasaki | KX 250F |
| 714 | Shawn | Rife | Springfield, OH | 250 | Honda | CRF250R |
| 726 | Cody | Lackore | Farmington, MN | 250 | Kawasaki | KX 250F |
| 747 | Trevor | Carmichael | Chandler, AZ | 250 | Honda | CRF250R |
| 804 | Jason | Langford Jr. | Palestine, TX | 250 | Kawasaki | KX 250F |
| 854 | Landen | Powell | Salt Lake City, UT | 250 | Honda | CR250R |
| 862 | Ozzy | Barbaree | Pine Bluff, AR | 250 | Suzuki | RMZ 250 |
| 884 | Kerim | Fitz-Gerald | South Africa | 250 | KTM | 250 SX-F |
| 918 | Michael | Akaydin | Lexington, KY | 250 | Kawasaki | KX 250F |
| 919 | Shawn | Rhinehart | Littlerock, CA | 250 | Suzuki | RMZ 250 |
| 925 | Cody | Young | Menifee, CA | 250 | Suzuki | RMZ 250 |
| 929 | Travis | Bell | Ukiah, CA | 250 | Honda | CRF250R |
| 956 | Blake | Wharton | Pilot Point, TX | 250 | Suzuki | RMZ 250 |
| 965 | Travis | Bright | Ventura, CA | 250 | Honda | CRF250R |
WMX
| # | First Name | Last Name | Birth Place | Class | Brand | Model |
| 1 | Ashley | Fiolek | Wayne, MI | WMX | Honda | CRF250R |
| 2 | Jessica | Patterson | Tallahassee, FL | WMX | Suzuki | RMZ 250 |
| 3 | Tarah | Gieger | Puerto Rico | WMX | Honda | CRF250R |
| 4 | Jacqueline | Strong | Sedona, AZ | WMX | KTM | 250 SX-F |
| 7 | Kasie | Creson | Vallejo, CA | WMX | Honda | CRF250R |
| 9 | Sayaka | Kaneshiro | Japan | WMX | Honda | CRF250R |
| 11 | Mariana | Balbi | Brazil | WMX | Honda | CRF250R |
| 15 | Ashley | Boham | Loveland, CO | WMX | Kawasaki | KX 250F |
| 17 | Sade | Allender | Sanford, ME | WMX | Honda | CRF250R |
| 20 | Jackie | Ives | Visalia, CA | WMX | Yamaha | YZ 250F |
| 24 | Amanda | Brown | Baltimore, MD | WMX | Honda | CRF250R |
| 26 | Ashleigh | Hall | Shady Point, Ok | WMX | Suzuki | RMZ 250 |
| 27 | Alyssa | Fitch | Gunnison, CO | WMX | KTM | 250 SX-F |
| 29 | Tressa | Rau | Sidney, MT | WMX | Honda | CRF250R |
| 32 | Sara | Pettersson | Sweden | WMX | KTM | 250 SX-F |
| 35 | Justine | Cox | Lincoln, NE | WMX | Kawasaki | KX 250F |
| 36 | Christina | Reed | Morrison, CO | WMX | Yamaha | YZ 250F |
| 38 | Jessie | Wharton | Hockinson , WA | WMX | Kawasaki | KX 250F |
| 41 | Lauren | Volentir | Denver, CO | WMX | Kawasaki | KX 250F |
| 47 | Brianna | DeGray | Springfield, MA | WMX | KTM | 250 SX-F |
| 52 | Meghan | McClain | Anchorage, AK | WMX | Honda | CRF250R |
| 55 | Sydney | Dickson | Redmond, WA | WMX | KTM | 250 SX-F |
| 56 | Chelsea | Newbold | Glen Burnie | WMX | Honda | CRF250R |
| 60 | April | Zastrow | Nampa, ID | WMX | Honda | CRF250R |
| 61 | Christel | Allen | Hesperia, CA | WMX | Honda | CRF250R |
| 66 | Meghan | Rutledge | Australia | WMX | Kawasaki | KX 250F |
| 71 | Cady | VanCura | Grand Haven, MI | WMX | KTM | 250 SX-F |
