Three Chimneys Farm's Great White (Volatile) tuned up for his dirt racing debut in Saturday's GI Toyota Blue Grass by working a half-mile in company in :47.60 over a fast track a Keeneland Sunday morning. Working with the 3-year-old maiden Just Munny (Justify), Great White, accompanied by rider Omar Torres, started two lengths behind his stablemate and finished two lengths in front with fractions of :35.60, :47.60 and galloping out five furlongs in 1:01.20. "He started off slow but then flew down the lane and Alex [Achard] had a hard...