World Series of Fighting 4: Spong vs. DeAnda was a mixed martial arts event held August 10, 2013 in Ontario, California, United States.
World Series of Fighting 13: Moraes vs. Bollinger was a mixed martial arts event held September 13, 2014 in Bethlehem, Pennsylvania, United States, The event aired on NBCSN.
The next generation of UFC stars are produced in an intense elimination tournament that separates the contenders from the pretenders.
