Os números do AMA Pro Supercross e Motocross foram revelados para a temporada de 2021. Enzo Lopes é o 50.
Os irmãos Lawrence e Max Anstie têm novos números, enquanto Dylan Ferrandis mantém o # 14, apesar de # 8 estar disponível.
* número de corrida
1 450SX Eli Tomac
1 450 Classe Zach Osborne
1 250 Classe Dylan Ferrandis
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
14 ** Dylan Ferrandis
15 * Dean Wilson
16 * Zach Osborne
17 * Joey Savatgy
18 Jett Lawrence
19 * Justin Bogle
20 * Broc Tickle
21 * Jason Anderson
22 * Chad Reed
23 * Chase Sexton
24 * RJ Hampshire
25 * Marvin Musquin
26 * Alex Martin
27 * Malcolm Stewart
28 Brandon Hartranft
29 Christian Craig
30 Jo Shimoda
31 Cameron McAdoo
32 * Justin Cooper
33 Derek Drake
34 Max Anstie
35 Mitchell Harrison
36 Martin Davalos
37 Benny Bloss
38 Austin Forkner
39 Carson Mumford
40 Vince Friese
41 Hunter
42 Michael Mosiman
43 Fredrik Noren
44 Tyler Bowers
45 Pierce Brown
46 * Justin Hill
47 Jalek Swoll
48 Garrett Marchbanks
49 Mitchell Oldenburg
50 Enzo Lopes
51 * Justin Barcia
52 Luke Clout
53 Jake Masterpool
54 Nick Gaines
55 John Short
56 Kyle Peters
57 Justin Rodbell
58 Jacob Hayes
59 Jarrett Frye
60 Chris Blose
61 Joey Crown
62 Mason Gonzales
63 Martin Castelo
64 Colt Nichols
65 Carson Brown
66 Jordan Bailey
67 Stilez Robertson
68 Jace Owen
69 Robbie Wageman
70 Henry Miller
71 Killian Auberson
72 Coty Schock
73 Derek Kelley
74 Mitchell Falk
75 Ty Masterpool
76 Grant Harlan
77 Jerry Robin
78 Kyle Cunningham
79 Isaac Teasdale
80 Jordon Smith
81 Justin Starling
82 Lorenzo Locurcio
83 Alex Ray
84 Josh Hill
85 Kevin Moranz
86 Darian Sanayei
87 Curren Thurman
88 Logan Karnow
89 Ryan Breece
90 Dilan Schwartz
91 Nate Thrasher
92 Chase Marquier
93 Hardy Munoz
94 * Ken Roczen
95 Josh Osby
96 Michael Leib
97 Ben LaMay
98 Justin Hoeft
99 Hunter Sayles
