Strikeforce: Diaz vs. Cyborg Results

MAIN CARD
• Champ Nick Diaz def. Evangelista "Cyborg" Santos via submission (armbar) - Round 2, 4:50 (retains welterweight title)
• Champ Ronaldo "Jacare" Souza def. Robbie Lawler via submission (rear-naked choke) - Round 3, 2:00 (retains middleweight title)
• Herschel Walker def. Scott Carson via TKO (strikes) - Round 1, 3:13
• Roger Gracie def. Trevor Prangley via submission (rear-naked choke) - Round 1, 4:19

PRELIMINARY CARD
• Nate Moore def. Nathan Coy via KO (punches) - Round 2, 0:25
• Isaiah Hill def. Bobby Stack via submission (triangle choke) - Round 1, 1:02
• Ron Keslar def. Eric Lawson via submission (armbar) - Round 1, 1:57
• Germaine de Randamie def. Stephanie Webber via TKO (strikes) - Round 1, 4:25
• James Terry def. Lucas Gamaza via TKO (strikes) - Round 1, 3:26
• Jenna Castillo def. Charlene Gellner via TKO (strikes) - Round 2, 3:57
• Anthony Dariano def. Alan Perez via unanimous decision (no scores announced)*
• Ricky Jackson def. Niko Jackson via unanimous decision (no scores announced)*
•Armin Safiari def. Sam Bracamonte via unanimous decision (no scores announced)*

* - Amateur bout
No titles changed hands in Strikeforce's first championship doubleheader of 2011.