Watch UFC 155: Dos Santos vs. Velasquez 2 (2012) Online
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- RUNTIME: 2h 56m
- Subtitles: English
UFC 155: Dos Santos vs. Velasquez II was a mixed martial arts pay-per-view event held by the Ultimate Fighting Championship on December 29, 2012 at the MGM Grand Garden Arena, Las Vegas, Nevada, United States.