2011 in Strikeforce  The year 2011 is the 6th year in the history of Strikeforce, a mixed martial arts promotion based in the United States. In 2011 Strikeforce held 16 events beginning with, "Strikeforce Challengers: Woodley vs. Saffiedine". Strikeforce Challengers: Woodley vs. Saffiedine was an event held on January 7, 2011 at the Nashville Municipal Auditorium in Nashville, Tennessee. Strikeforce: Diaz vs. Cyborg was an event held on January 29, 2011 at the HP Pavilion at San Jose in San Jose, California. Strikeforce: Fedor vs. Silva was an event held on February 12, 2011 at the Izod Center in East Rutherford, New Jersey. Strikeforce Challengers: Beerbohm vs. Healy was an event held on February 18, 2011 at the Cedar Park Center in Cedar Park, Texas. Strikeforce: Feijao vs. Henderson was an event held on March 5, 2011 at the Nationwide Arena in Columbus, Ohio. Strikeforce Challengers: Wilcox vs. Damm was an event held on April 1, 2011 at the Stockton Arena in Stockton, California. Strikeforce: Diaz vs. Daley was an event held on April 9, 2011 at the Valley View Casino Center in San Diego, California. Strikeforce: Overeem vs. Werdum was an event held on June 18, 2011 at the American Airlines Center in Dallas, Texas. Strikeforce Challengers: Fodor vs. Terry was an event held on June 24, 2011 at the ShoWare Center in Kent, Washington. Strikeforce Challengers: Voelker vs. Bowling III was an event held on July 22, 2011 at the Palms Casino Resort in Las Vegas, Nevada. Strikeforce: Fedor vs. Henderson was an event held on July 30, 2011 at the Sears Centre in Hoffman Estates, Illinois. Strikeforce Challengers: Gurgel vs. Duarte was an event held on August 12, 2011 at the Palms Casino Resort in Las Vegas, Nevada. Strikeforce: Barnett vs. Kharitonov was an event held on September 10, 2011 at the U.S. Bank Arena in Cincinnati, Ohio. Strikeforce Challengers: Larkin vs. Rossborough was an event held on September 23, 2011 at the Palms Casino Resort in Las Vegas, Nevada. Strikeforce Challengers: Britt vs. Sayers was an event held on November 18, 2011 at the Palms Casino Resort in Las Vegas, Nevada.