Yvel (36-13-1) earned the gig with his knockout win over former UFC title challenger Pedro Rizzo on Saturday at "Ultimate Chaos" in Biloxi, Mississippi.
Sylvia was removed from the fight following his nine-second loss to Ray Mercer this month at Adrenaline 3.
Atencio likes to leave fighters coming off a recent loss for a future card. Another fighter a casualty of accepting a fight and losing prior to the August 1 Affliction card is Brett Cooper, who was knocked out at "Ultimate Chaos" by Waachim Spiritwolf. Nick Thompson and Gabe Ruediger are among the fighters campaigning to fill in for Cooper against Akbarh Arreola (14-4-1).
Buentello (27-10) will look to remain undefeated with Affliction. The four-time UFC competitor defeated Gary Goodridge and Kirill "Baby Fedor" Sidelnikov at the first two Affliction events.
