by Ray HuiFiled under: Strikeforce, FanHouse ExclusiveThe Ultimate Fighter 6 contestant John Kolosci left a six-figure job exactly a year ago to pursue mixed martial arts as a full-time career, and he's hoping to make an impression Saturday in his Strikeforce debut on the undercard of the CBS-televised "Fedor vs. Rogers" event in Hoffman Estates, Ill.He'll take on 26-year-old Shamar Bailey (12-1), a firefighter with a wrestling background who trains with UFC veterans Chris L...