He hasn't won an MMA fight in more than ten years. He used to be a lightweight contender in the UFC and was on "The Ultimate Fighter 2." He fought Nate Diaz, Donald Cerrone, and Jeremy Stephens in the Octagon. Guillard has one of the worst losing streaks in recent memory, with eleven losses and one no-contest. But Guillard hasn't been losing to just anyone in the region. Guillard lost his first fight in 2014 to Justin Gaethje, a former BMF Champion, who he lost by a split decision. He then lost to Israel Adesanya, a former two-time UFC Middleweight Champion, in 2017. Guillard will try to get back to winning ways in his next fight, which will be 0-2 in 2025. This September, Guillard will fight his third undefeated fighter in a row. Guillard was stopped by Isaac Moreno (7-0) and former UFC fighter Josiah Harrell (10-0) in less than two rounds over the course of a few months after a four-year break. Guillard is back in the ring on September 20 in Lake Charles, Louisiana, to fight welterweight prospect Terry Wiggins (3-0). Guillard has a big advantage in experience going into this fight because he has fought in more than 60 combat sports. Guillard last fought a 3-0 fighter in the cage at UFC 60 in 2006.