Oliveira was slated to serve as the UFC welcoming party for top Swedish-Iranian prospect Reza Madadi (11-2). A replacement opponent as yet to be determined by UFC officials.
The withdrawal is unfortunate for Oliveira, who hoped to avoid a pink slip after losing two straight UFC contests against Gleison Tibau and Yves Edwards to drop his Octagon record to 1-4. Prior to his slump, "Tractor" ripped through a four-fight win streak inside regional promotions to gain reentry into the UFC.
UFC on FX 1 fight card:
Lightweight: Jim Miller vs. Melvin Guillard
Welterweight: Josh Neer vs. Duane Ludwig
Heavyweight: Pat Barry vs. Christian Morecraft
Lightweight: Reza Madadi vs. TBA
Featherweight: Mike Brown vs. Vagner Rocha
Middleweight: Jorge Rivera vs. Eric Schafer
Light Heavyweight: Ryan Jimmo vs. Karlos Vemola
Welterweight: Charlie Brenneman vs. Daniel Roberts
Bantamweight: Joseph Sandoval vs. Nick Denis