Strikeforce MMA White Graphic T-Shirt

Founded as a kickboxing organization, Strikeforce later became the number-two mixed martial arts promotion in the world. Its first MMA event, Strikeforce: Shamrock vs. Gracie, was held on March 10, 2006, at the HP Pavilion in San José, California. The event was California's first regulated MMA event and broke the previous record for largest audience at a MMA event in North America, with its 18,265 in attendance. The record was since broken by UFC 129.