The two fighters first met on the November 12th undercard of UFC on Fox 1. After a back-and-forth opening two rounds, Peralta appeared to drop Semerzier with a glancing blow midway through the final frame before finishing him off for a TKO victory.
However, upon replay inspection, it was apparent that an accidental headbutt was the cause of the knockdown. Semerzier's representation filed an appeal with the California State Athletic Commission, who ultimately overturned the result to a no contest.
Semerzier (6-3, 1 NC), meanwhile, hopes to continue on the upswing after halting a three-fight slump with a first-round submission win over Alex Caceres in his UFC debut.
UFC on FX 2 fight card:
Welterweight: Martin Kampmann vs. Thiago Alves
Flyweight: Ian McCall vs. Demetrious Johnson
Flyweight: Joseph Benavidez vs. Yasuhiro Urushitani
Middleweight: Court McGee vs. Constantinos Philippou
Welterweight: Jake Hecht vs. T.J. Waldburger
Light heavyweight: James Te Huna vs. Aaron Rosa
Featherweight: Cole Miller vs. Steven Siler
Heavyweight: Oli Thompson vs. Shawn Jordan
Middleweight: Kyle Noke vs. Jared Hamman
Light heavyweight: Anthony Perosh vs. Nick Penner
Featherweight: Mackens Semerzier vs. Roberto Peralta