The UFC's next card on big FOX is filling up pretty quickly.
A pair of important lightweight fights have been added to the event -- Rustam Khabilov vs. Danny Castillo and Ramsey Nijem vs. Erik Koch, MMAFighting.com confirmed Wednesday with UFC officials. FOX Sports was the first to break the news of both bouts.
Khabilov (17-3) has lost two straight, but the first came against former UFC lightweight champion Benson Henderson last June. The Dagestan native fell by split decision to Adriano Martins in February.