Answer
Dan Henderson was the last Light Heavyweight Champion in Strikeforce. He won the title by defeating Rafael Cavalcante in the finals of the Strikeforce Light Heavyweight Grand Prix at Strikeforce: Fedor vs. Henderson II on July 30, 2011. Henderson would defend the title once, defeating Renato Sobral at Strikeforce: Barnett vs. Kharitonov on January 27, 2012. Henderson would vacate the title on April 3, 2012, after signing with the UFC.