5th-Churchill Downs, $123,375, Msw, 11-1, 2yo, 6f, 1:10.25, ft, 2 1/4 lengths. SPEED KING (c, 2, Volatile--Athenian Beauty, by Corinthian) defied the betting public's 22-1 odds here with a frontrunning score in this unveiling beneath the Twin Spires. Bumped leaving the gate, but able to recover quickly enough to step forward to set the pace, the grey put space between himself and the field via :22.25 and :45.78 opening fractions. Entering the lane with a 2 1/2-length margin, he greenly but gamely hung on to win despite lingering on his...