Donald Cerrone replaces Sam Stout against Dennis Siver at UFC 137
UFC 137 took a blow but quickly recovered earlier today as Sam Stout pulled out of his lightweight bout against perennial title contender Dennis Siver. The reason for Stout’s withdrawal is unknown, but Stout suffered a loss in his personal life on August 14, when his longtime friend and coach Shawn Tompkins tragically passed away. [...]
Source: http://fiveouncesofpain.com/2011/08/29/sam-stout-out-of-ufc-137-bout-with-dennis-siver/