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Ronaldo 'Jacare' Souza knocks out Derek Brunson during the Strikeforce event at Valley View Casino Center on August 18, 2012 in San Diego, California.

Strikeforce: Rousey vs. Kaufman

August 23, 2012

Ronda Rousey and Sarah Kaufman headlined the Strikeforce card on Saturday, August 18, at the Valley View Casino Center in San Diego, Calif. Photos taken by Tracy Lee, special to Yahoo! Sports.