The Transnational Boxing Rankings Board's latest rankings- those based on fights held through June 27, 2021- were posted on the TBRB's website June 29, 2021. There were changes in the rankings for eight of the seventeen weight classes:

CRUISERWEIGHT:

Champion: Mairis Briedis

1 (1) Yuniel Dorticos
2 (2) Ilunga Makabu
3 (3) Lawrence Okolie
4 (4) Thabiso Mchunu
5 (5) Kevin Lerena
6 (6) Aleksei Papin
7 (7) Michal Cieslak
8 (9) Mateusz Masternak
9 (-) Brandon Glanton
10 (10) Efetobor Apochi

Out from rankings posted June 22, 2021:
#8 Arsen Goulamirian (extended inactivity)

SUPER MIDDLEWEIGHT:

Champion: OPEN

1 (1) Saul "Canelo" Alvarez
2 (2) Caleb Plant
3 (3) David Benavidez
4 (4) Callum Smith
5 (5) John Ryder
6 (6) Danny Jacobs
7 (7) Carlos Gongora
8 (-) David Morrell, Jr.
9 (8) Billy Joe Saunders
10 (9) Fedor Chudinov

Out from rankings posted June 22, 2021:
#10 Gabriel Rosado

MIDDLEWEIGHT:

Champion: VACANT

1 (1) Gennady Golovkin
2 (2) Jermall Charlo
3 (3) Demetrius Andrade
4 (4) Jaime Munguia
5 (5) Sergiy Derevyanchenko
6 (-) Zhanibek Alimkhanuly
7 (8) Maciej Sulecki
8 (9) Liam Williams
9 (10) Chris Eubank, Jr.
10 (-) Felix Cash

Out from rankings posted June 22, 2021:
#6 Ryota Murata (extended inactivity)
#7 Rob Brant

JUNIOR MIDDLEWEIGHT:

Champion: OPEN

1 (1) Jermell Charlo
2 (2) Brian Castano
3 (7) Erickson Lubin
4 (4) Julian Williams
5 (5) Erislandy Lara
6 (6) Tony Harrison
7 (3) Jeison Rosario
8 (8) Tim Tszyu
9 (9) Sebastian Fundora
10 (10) Patrick Teixeira

Out from rankings posted June 22, 2021:
No one

JUNIOR WELTERWEIGHT:

Champion: Josh Taylor

1 (1) Regis Prograis
2 (2) Jose Carlos Ramirez
3 (3) Jose Zepeda
4 (4) Viktor Postol
5 (5) Ivan Baranchyk
6 (6) Arnold Barboza, Jr.
7 (-) Gervonta Davis (is also ranked #2 at 130 and #8 at 135)
8 (7) Robert Easter, Jr.
9 (8) Jack Catterall
10 (10) Subriel Matias

Out from rankings posted June 22, 2021:
#9 Mario Barrios

LIGHTWEIGHT:

Champion: Teofimo Lopez

1 (1) Vasiliy Lomachenko
2 (2) Ryan Garcia
3 (3) Devin Haney
4 (4) Richard Commey
5 (5) Luke Campbell
6 (6) Isaac Cruz
7 (7) Emmanuel Tagoe
8 (8) Gervonta Davis (is also ranked #2 at 130 and #7 at 140)
9 (10) George Kambosos, Jr.
10 (-) Javier Fortuna

Out from Rankings from June 22, 2021:
#9 Masayoshi Nakatani

FLYWEIGHT:

Champion: OPEN

1 (1) Julio Cesar Martinez
2 (2) Sunny Edwards
3 (3) Moruti Mthalane
4 (4) Artem Dalakian
5 (5) Sho Kimura
6 (6) Junto Nakatani
7 (7) Cristofer Rosales
8 (-) Ricardo Sandoval
9 (9) Muhammad Waseem
10 (10) Luis Concepcion

Out from rankings posted June 22, 2021:
#8 Jay Harris

JUNIOR FLYWEIGHT:

Champion: OPEN

1 (1) Kenshiro Teraji
2 (2) Hiroto Kyoguchi
3 (3) Felix Alvarado
4 (4) Elwin Soto
5 (5) Mark Vicelles
6 (6) Sivenathi Nontshinga
7 (7) Agustin Mauro Gauto
8 (8) Esteban Bermudez
9 (9) Jesse Rodriguez
10 (-) Daniel Matellon

Out from rankings posted June 22, 2021:
#10 Tetsuya Hisada