Strikeforce Scott Coker confirmed the signing on Sunday in an interview with Michael David Smith of FanHouse.
Werdum's last fight was a loss to Junior Dos Santos at UFC 90 in October 2008 that sent Werdum packing from the organization. It was a major upset for Werdum, who was near a title shot as the odd man out of the UFC's four-man heavyweight tournament with Randy Couture, Brock Lesnar, Frank Mir and Antonio Rodrigo Nogueira.
Werdum stated at the Strikeforce "Shamrock vs. Diaz" post-fight press conference that he would like to challenge Overeem for the belt. However, Coker told FanHouse that Werdum's challenge was unexpected and the fight is simply a possibility but not definite. Coker is looking at other heavyweight free agents or heavyweights in non-exclusive contracts to match up with Werdum.