He was a force of nature in his prime, a terrifying physical specimen in which power, speed and a zeal for doing harm to others merged. Quinton Jackson will celebrate his 40th birthday on June 20.

“Rampage” made his professional mixed martial arts debut in November 1999 and has since compiled a 37-13 record in 50 bouts across various promotions, from King of the Cage and Pride Fighting Championships to the Ultimate Fighting Championship and Bellator MMA. Jackson reached his peak at UFC 71 on May 26, 2007, when he stopped Chuck Liddell with first-round punches and captured the undisputed light heavyweight title; it was his second win over Liddell. The Memphis, Tennessee, native’s remarkable career includes other notable victories against Igor Vovchanchyn, Kevin Randleman, Murilo Bustamante, Matt Lindland, Ricardo Arona, Dan Henderson, Wanderlei Silva and Lyoto Machida.

Jackson last competed at Bellator 192 in January, when he dropped a unanimous decision to Chael Sonnen in the quarterfinals of the 2018 Bellator MMA heavyweight grand prix.

Others in MMA celebrating a birthday during the month of June:

JUNE 1

Miodrag Petkovic, 49
Michael Buchkovich, 41
Wendell de Oliveira Marques, 35
Patricky Freire, 32

JUNE 2

Chris Haseman, 49
Matt Serra, 44
Antonio Rodrigo Nogueira, 42
Antonio Rogerio Nogueira, 42
Christian M'Pumbu, 41
Roan Carneiro, 40
Tatsuya Mizuno, 37
Eduardo Bustillos, 31
Christopher Wing, 30

JUNE 3

Jason MacDonald, 43
Linton Vassell, 35
Mara Romero Borella, 32
Vernon Ramos, 26

JUNE 4

Tonya Evinger, 37
Michael Johnson, 32
James Krause, 32
Saul Almeida, 29

JUNE 5

Brian Warren, 44
Jose Caceres, 31
Samba Coulibaly, 31
Ricky Turcios, 25

JUNE 6

David Bielkheden, 39
Vagner Rocha, 36
Ray Wood, 29
Xavier Siller, 24

JUNE 7

Chris Wilson, 41
Saad Awad, 35
Ryan Bader, 35
Michael Kuiper, 29
Mark Burns, 27

JUNE 8

Dan Severn, 60
Marvin Eastman, 47
Hirotaka Yokoi, 40
Noad Lahat, 34
Tim Roman, 33

JUNE 9

Dion Staring, 40
Muslim Salikhov, 34
John Phillips, 33
Jim Hettes, 31

JUNE 10

Cyrille Diabate, 45
Brendan Tierney, 43
Luiz Azeredo, 42
Hiroyuki Takaya, 41
Nordine Taleb, 37
Walt Harris, 35

JUNE 11

Tsuneo Kimura, 36
Daron Cruickshank, 33
Artur Kadlubek, 33
J.J. Aldrich, 26

JUNE 12

Andy Ologun, 35
Ali Bagautinov, 33
James Chaney, 31
John Lineker, 28

JUNE 13

Daniel Aguiar, 38
Greg Rebello, 36
Paul Bradley, 35
Lucie Pudilova, 24

JUNE 14

Claude Patrick, 38
Danny Martinez, 33
Chris Barnett, 32
Anatpong Bunrad, 32
Amador Ramirez, 28

JUNE 15

Kevin Casey, 37
Joe Stevenson, 36
Ryan Keenan, 33
Gabriel Benitez, 30

JUNE 16

Rich Attonito, 41
Daria Ibragimova, 34
Chris Gruetzemacher, 32
Xiaonan Yan, 29

JUNE 17

Kuniyoshi Hironaka, 42
Chris Weidman, 34
Xiao Yang Liu, 27
Luan Chagas, 25

JUNE 18

Assuerio Silva, 44
Matt Baker, 34
Darrill Schoonover, 33
Kwan Ho Kwak, 29

JUNE 19

Chris Seifert, 49
Savant Young, 42
Mike Swick, 39
Ann Osman, 32

JUNE 20

Roy Nelson, 42
Marion Reneau, 41
Quinton Jackson, 40
Alex Caceres, 30
Logan Nail, 29

JUNE 21

Marcos Oliveira, 40
Erick Silva, 34
Jake Lindsey, 32
Tom Duquesnoy, 25

JUNE 22

Randy Couture, 55
Ryushi Yanagisawa, 46
Brian Bowles, 38
Hiroshi Izumi, 36
Bethe Correia, 35
Douglas Silva de Andrade, 33
Dave Morgan, 33
Bradley Scott, 29
Taila Santos, 25

JUNE 23

Charles “Mask” Lewis, 1963-2009
Rob Wince, 45
Marcos Galvao, 37
Nick Thompson, 37
Paul Ruiz, 31
Mark Striegl, 30

JUNE 24

Junior Assuncao, 37
Jessamyn Duke, 32
Brendan O'Reilly, 31
Brian Camozzi, 27

JUNE 25

Yoshihiro Nakao, 46
Alexey Oleynik, 41
Luciano Azevedo, 37
Carlo Prater, 37
Marcelo Guimaraes, 35
Marcos Rogerio de Lima, 33
Rob Font, 31
Jung Kyung Lee, 30
Andre Fili, 28

JUNE 26

Pawel Nastula, 48
Virgil Zwicker, 36
Eddie Wineland, 34
Faith Van Duin, 32

JUNE 27

Mu Bae Choi, 48
Yoshinori Suzuki, 37
Joe Taimanglo, 34
Ben Reiter, 31

JUNE 28

Sam Hoger, 38
DaMarques Johnson, 36
Brennan Ward, 30
Johnny Case, 29

JUNE 29

Shin Kochiwa, 38
Ryo Kawamura, 37
Mike Whitehead, 37
Cody East, 30
Jimmie Rivera, 29
Rose Namajunas, 26

JUNE 30

Fabiano Scherner, 46
Gilbert Yvel, 42
Katja Kankaanpaa, 37
Dan Miller, 37
Zach Makovsky, 36