A potential top contender’s fight has been added to Strikeforce: Rousey vs. Kaufman as Ronaldo Souza will face Derek Brunson. Souza is a former Strikeforce Middleweight Champion who is coming off of a victory over Bristol Murande at Strikeforce: Tate vs. Rousey. Brunson is coming off of his first career loss, which came to UFC veteran Kendall Grove at Shofight 20, Brunson took the fight with less than a week’s notice. Strikeforce: Rousey vs. Kaufman takes place on August 18th at the Valley View Casino Center in San Diego, California with Ronda Rousey and Sarah Kaufman headlining.