The Ultimate Fighter season 1 winner, packed his bags and moved up to welterweight following his title defeat, but as of late decided to give the 155 division another run.
AS a result of the missed weight Sanchez will be fined a portion of his purse that could amount to $20,000 should he win.
UFC on fUEL TV takes place tomorrow from the Saitama Super Arena in Saitama, Japan.
All other fighters made their contracted weight obligations and the full results are as follows:
MAIN CARD: (FUEL TV, 10 p.m. ET)
Wanderlei Silva (204) vs. Brian Stann (206)
Mark Hunt (266) vs. Stefan Struve (260)
Takanori Gomi (156) vs. Diego Sanchez (158)*
Hector Lombard (186) vs. Yushin Okami (185)
Mizuto Hirota (146) vs. Rani Yahya (146)
Siyar Bahadurzada (171) vs. Dong Hyun Kim (171)
PRELIMINARY CARD: (Facebook, 7:30 p.m. ET)
Riki Fukuda (186) vs. Brad Tavares (185)
Bryan Caraway (135) vs. Takeya Mizugaki (136)
Cristiano Marcello (156) vs. Kazuki Tokudome (155)
Alex Caceres (136) vs. Kyung Ho Kang (135)
Marcelo Guimaraes (171) vs. Hyun Gyu Lim (171)