Captain Cook won the $250,000 Withers by 2 1/4 lengths at Aqueduct to join the Kentucky Derby trail. Ridden by Manny Franco, Captain Cook ran nine furlongs in 1:51.83.

Mystik Dan, the 150th winner of the Kentucky Derby, will be etched in the history books and on a horse lover’s arm. Stride safety sensors can measure 2400 motions per second, sometimes before the ...