Strikeforce: Barnett vs. Cormier was a mixed martial arts event held by Strikeforce. It took place on May 19, 2012, at the HP Pavilion in San Jose, California.
Nate Marquardt was expected to fight Tyron Woodley at this event for the vacant Strikeforce Welterweight Championship. It instead took place at , where Marquardt won the title by fourth-round knockout.
<nowiki>**</nowiki> = Replacement