At WSOF 20 on April 10, Matt Hamill will face Vinny Magalhaes in the second semifinal to crown a light heavyweight champion. Thiago Silva and Ronny Markes meet in the other semi. The card will also feature Melvin Guillard vs. Ozzy Dugulubgov.
The WSOF 21 card on June 5 from Edmonton, Alberta, Canada will boast Ryan Ford vs. Yushin Okami and heavyweight champion Smealinho Rama vs. Blagoi Ivanov.
The 38-year-old Hamill (11-5) last fought in 2013, losing to Silva in the UFC. He has gone just 1-3 in his last four overall.
Magalhaes (12-7) won the Titan FC light heavyweight title when he submitted Jason Brilz in September. He is a former Ultimate Fighter runner-up who had two stints with the UFC.
Guillard (32-14-2) is another veteran of the Octagon, while Dugulubgov (6-2) knocked out Keon Caldwell in his last fight.
Ford (22-5) suffered a submission loss to Jake Shields in October after winning the WSOF Canadian welterweight title earlier in the year. Okami (30-9) lost to David Branch for the WSOF welterweight title in November, suffering a fourth round TKO defeat.
Rama (9-1) picked up a TKO victory over Derrick Mehmen in his most recent appearance, while Ivanov (11-1) lost in Bellator to Alexander Volkov.