List of Strikeforce champions

Strikeforce is an American mixed martial arts promotion, and the following is a history of its champions at each weight class.

Strikeforce champions

Heavyweight Championship

206 pounds (93 kg) to 265 pounds (120 kg)

No.	Name:	Date:	Location:	Defenses:
1	Alistair Overeem def. Paul Buentello	November 16, 2007 Strikeforce: Four Men Enter, One Man Survives	San Jose, CA

Light Heavyweight Championship

186 pounds (84 kg) to 205 pounds (93 kg)

No.	Name:	Date:	Location:	Defenses:
1	Bobby Southworth def. Vernon White	December 8, 2006 Strikeforce: Triple Threat	San Jose, CA	def. Anthony Ruiz on June 27, 2008 at Strikeforce: Melendez vs. Thomson
2	Renato Sobral	November 21, 2008 Strikeforce: Destruction	San Jose, CA
3	Gegard Mousasi	August 15, 2009 Strikeforce: Carano vs. Cyborg	San Jose, CA

Middleweight Championship

171 pounds (78 kg) to 185 pounds (84 kg)

No.	Name:	Date:	Location:	Defenses:
1	Frank Shamrock def. Phil Baroni	June 22, 2007 Strikeforce: Shamrock vs. Baroni	San Jose, CA
2	Cung Le	March 29, 2008 Strikeforce: Shamrock vs. Le	San Jose, CA
The title was vacated on September 17, 2009 when Le stepped down due to filming obligations.
3	Jake Shields def. Jason Miller	November 07, 2009 Strikeforce: Fedor vs Rogers	Chicago, IL

Welterweight Championship

156 pounds (71 kg) to 170 pounds (77 kg)

No.	Name:	Date:	Location:	Defenses:
Vacant

Lightweight Championship

146 pounds (66 kg) to 155 pounds (70 kg)

No.	Name:	Date:	Location:	Defenses:
1	Clay Guida def. Josh Thomson	March 10, 2006 Strikeforce: Shamrock vs. Gracie	San Jose, CA
2	Gilbert Melendez	June 9, 2006 Strikeforce: Revenge	San Jose, CA	def. Gabe Lemley on March 29, 2008 at Strikeforce: Shamrock vs. Le
3	Josh Thomson	June 27, 2008 Strikeforce: Melendez vs. Thomson	San Jose, CA
	Gilbert Melendez def. Rodrigo Damm for interim title	April 11, 2009 Strikeforce: Shamrock vs. Diaz	San Jose, CA	def. Mitsuhiro Ishida on August 15, 2009 at Strikeforce: Carano vs. Cyborg
4	Gilbert Melendez (2) (def. Josh Thomson for undisputed title)	December 19, 2009 Strikeforce: Evolution‎	San Jose, CA

Women's Lightweight Championship

136 pounds (62 kg) to 145 pounds (66 kg)

No.	Name:	Date:	Location:	Defenses:
1	Cristiane Santos def. Gina Carano	August 15, 2009 Strikeforce: Carano vs. Cyborg	San Jose, CA

Women's Featherweight Championship

126 pounds (57 kg) to 135 pounds (61 kg)

No.	Name:	Date:	Location:	Defenses:
Vacant

Defunct Championships

Middleweight U.S. Championship

170 pounds (77 kg) to 185 pounds (84 kg)

Name:	Date:	Location:	Defenses:
Eugene Jackson def. Ronald Jhun	December 8, 2006 Strikeforce: Triple Threat	San Jose, CA

Lightweight U.S. Championship

145 pounds (66 kg) to 155 pounds (70 kg)

Name:	Date:	Location:	Defenses:
Josh Thomson def. Nam Phan	December 8, 2006 Strikeforce: Triple Threat	San Jose, CA	def. Nick Gonzalez on June 22, 2007 at Strikeforce: Shamrock vs. Baroni

Strikeforce Grand Prix Tournaments

Event	Weight class	Winner	Runner-up	Date
Strikeforce: Four Men Enter, One Man Survives	Middleweight	Jorge Santiago	Trevor Prangley	November 16, 2007