La fédération américaine a officialisé les numéros de course des pilotes engagés sur les championnats SX et outdoor 2020.
* = numéro de carrière
** = nouveau numéro de carrière à partir de 2020
| 1 – 450SX Cooper Webb |
| 1 – 450MX Eli Tomac |
| 1 – 250MX – Adam Cianciarulo |
| 1W Dylan Ferrandis |
| 1E Chase Sexton |
| 2* Cooper Webb |
| 3* Eli Tomac |
| 4* Blake Baggett |
| 6* Jeremy Martin |
| 7* Aaron Plessinger |
| 9**Adam Cianciarulo |
| 10* Justin Brayton |
| 11* Kyle Chisholm |
| 12* Shane McElrath |
| 13 Colt Nichols |
| 14** Dylan Ferrandis |
| 15* Dean Wilson |
| 16* Zach Osborne |
| 17* Joey Savatgy |
| 18* Weston Peick |
| 19* Justin Bogle |
| 20* Broc Tickle |
| 21* Jason Anderson |
| 22* Chad Reed |
| 23* Chase Sexton |
| 24** R.J. Hampshire |
| 25* Marvin Musquin |
| 26* Alex Martin |
| 27* Malcolm Stewart |
| 28 Michael Mosiman |
| 29 Cameron Mcadoo |
| 30 Brandon Hartranft |
| 31 Ty Masterpool |
| 32** Justin Cooper |
| 33* Joshua Grant |
| 34 Fredrik Noren |
| 35 Tyler Bowers |
| 36 Hunter Lawrence |
| 37 Garrett Marchbanks |
| 38 Martin Davalos |
| 39 Kyle Peters |
| 40 Jordan Bailey |
| 41 Mitchell Oldenburg |
| 42 Ben Lamay |
| 43 John Short |
| 44 Kyle Cunningham |
| 45 Jacob Hayes |
| 46* Justin Hill |
| 47 Lorenzo Locurcio |
| 48 Henry Miller |
| 49 Chris Blose |
| 50 Benny Bloss |
| 51* Justin Barcia |
| 52 Austin Forkner |
| 53 James Decotis |
| 54 Jordon Smith |
| 55 Chase Marquier |
| 56 Martin Castelo |
| 57 Justin Starling |
| 58 Derek Drake |
| 59 Sean Cantrell |
| 60 Joshua Osby |
| 61 Mitchell Falk |
| 62 Alex Ray |
| 63 Christian Craig |
| 64 Jess Pettis |
| 65 Vince Friese |
| 66 James Weeks |
| 67 Enzo Lopes |
| 68 Jerry Robin |
| 69 Nick Gaines |
| 70 Carlen Gardner |
| 71 Dylan Merriam |
| 72 Ryan Breece |
| 73 Robbie Wageman |
| 74 Mitchell Harrison |
| 75 Coty Schock |
| 76 Mike Alessi |
| 77 Kevin Moranz |
| 78 Jake Masterpool |
| 79 Isaac Teasdale |
| 80 Thomas Covington |
| 81 Anthony Rodriguez |
| 82 Cade Autenrieth |
| 83 Jett Lawrence |
| 84 Jo Shimoda |
| 85 Cole Martinez |
| 86 Joshua Cartwright |
| 87 Ramyller Alves |
| 88 Logan Karnow |
| 89 Marshal Weltin |
| 90 Killian Auberson |
| 91 Ryan Sipes |
| 92 Austin Politelli |
| 93 Blake Wharton |
| 94* Ken Roczen |
| 95 Carson Brown |
| 96 Justin Thompson |
| 97 Chris Howell |
| 98 Bradley Lionnet |
| 99 Brandon Leith |
