Joe Riggs has been forced to cancel his rematch with Nick Diaz in Strikeforce on the "Carano vs. Cyborg" show scheduled for August 15th due to a severe reaction to an undisclosed drug.  Rumored replacements for the Strikeforce 170 lb. championship fight are Jay Hieron, a fighter on the cancelled Affliction card, Paul "Semtex" Daley, and Phil Baroni.  (graciefighter.com) Former competitor on The Ultimate Fighter, Rob Emerson, has dropped out of his fight with fellow castmate George Sotiropoulos at UFC 101.  Rob Emerson was on quite a tear of late, defeating 4 straight going into the TUF broadcast, and beating Keita Nakamura and KO'ing Manny Gamburyan before tapping to Kurt Pellegrino.  (aroundtheoctagon.com) The UFC's Matt Wiman has sustained an injury that will prevent him from facing Rafael Dos Anjos at UFC 103, but Rob Emerson may capitalize on the circumstances by filling in for Wiman after cancelling his UFC 101 bout.  (mmajunkie.com)

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