Chael Sonnen offered up his services to fight Mauricio “Shogun” Rua when the Brazilian’s UFC 161 co-main event opponent, Antonio Rogerio Nogueira, had to drop out of the fight due to back problems. Shogun immediately accepted, but the fight isn’t going to happen at UFC 161 on June 15 in Winnipeg, Manitoba, Canada. It will instead be the headlining bout at UFC on FS1 1 on Aug. 17 in Boston.
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Chael Sonnen vs. Shogun Rua Headlines UFC on FS1 1 in Boston; Several Bouts Announced – MMA Weekly