MMAFighting.com's Ariel Helwani revealed that "The Young Assassin" will make his WSOF debut against Gesias Cavalcante on the July 5th fight card, which is headlined by a lightweight title fight between Justin Gaethje vs. Nick Newell.
Guillard was released from his UFC contract following a unanimous decision loss to Michael Johnson in March. Guillard went 12-9 (1 NC) inside the octagon, yet has not managed consecutive wins since July 2011. He holds notable victories over Jeremy Stephens, Dennis Siver, Gleison Tibau and Evan Dunham.
Cavalcante is coming off a third round stoppage victory over Tyson Griffin back at WSOF 4 last August. It marked his second victory in WSOF, with his first being a submission win over TJ O'Brien on the promotion's debut fight card.
WSOF 11 takes place on July 5, but the city and the venue are yet to be determined.