Who, born in 1982, was the main card for the fourth mixed martial arts event "Strikeforce: Triple Threat"?
Strikeforce: Triple Threat:  The main card featured the Strikeforce debut of Gina Carano. Gina Carano: Gina Joy Carano (born April 16, 1982) is an American actress, television personality, fitness model, and former mixed martial artist.
Gina Carano