UFC 161 will be a little shorter than most cards, Antonio Rogerio Nogueira had to pull out of his fight with Mauricio "Shogun" Rua. Though Chael Sonnen did ask for the fight, the UFC announced that they decided to scratch Rua from the card.
— UFC (@ufc) June 4, 2013
Sonnen lobbied for the fight by calling Rua a chicken. A fight between the two of them could still happen. Sonnen had been pushing for a fight with Wanderlei Silva, but knows the value of stepping in at the last minute for a bout. MMA Fighting says the Rua-Sonnen bout could happen in Boston in August.
The UFC also has other plans for Rua. His agent told Globo TV in Brazil that Rua will coach against Nogueira in an upcoming season of the Brazilian "Ultimate Fighter."