Strikeforce is a mixed martial arts (MMA) and kickboxing organization founded in 1985 and based in San Jose, California. Ever year Strikeforce holds the world championship mixed martial arts (MMA) in the following weight divisions:
Lightweight: 145.0 to 155.0 pounds (65.8 to 70.3 kg)
Welterweight:155.0 to 170.0 pounds (70.3 to 77.1 kg)
Middleweight: 170.0 to 185.0 pounds (77.1 to 83.9 kg)
Light heavyweight: 185.0 to 205.0 pounds (83.9 to 93.0 kg)
Heavyweight: 205.0 to 265.0 pounds (93.0 to 120.2 kg)
Championship matches are five five-minute rounds with a one-minute break in between.
Previous male champions include Alistair Overeem, Gegard Mousasi, Jake Shields, Josh Thomson, Gilbert Melendez, Bobby Southworth, Renato Sobral, Frank Shamrock, Cung Le, Clay Guida, Eugene Jackson, and others.
Previous female champions include Cristiane Santos.