Melendez took on Josh Thomson in a rubber match for the Strikeforce Lightweight Championship at in San Jose, California on May 19, 2012. He won the fight via split decision. Fans did not agree with the decision and Josh Thomson was visibly disappointed by the decision. Booing immediately followed the decision and continuously throughout Melendez's post fight interview. Thomson, although not pleased with the decision, showed class in defeat by asking the crowd to stop booing and support the local fighter.