Unbeaten 'TDN Rising Star' Knightsbridge (c, 3, Nyquist--Tyburn Brook, by Bernardini), a jaw-dropping winner of his first two starts by a combined 19 1/2 lengths, has begun gearing up for a potential return to action this fall at Keeneland. The Godolphin homebred posted a double-digit victory going seven furlongs on debut at Churchill Downs Nov. 4, then fired fresh off the bench with another dominating decision in an optional claimer going a one-turn mile at Gulfstream Park last out Mar. 28. The latter performance earned him a 96 Beyer Speed...