Winless in seven starts on the main track, Zayat Stables' Thorn Song (Unbridled's Song) has never missed the exacta in six tries on the turf and recorded a new high Friday, getting up for a nose victory over favored Cosmonaut (Lemon Drop Kid) in the co-featured GIII River City H. at Churchill Downs. Dismissed at odds of 7-1 despite a last-out second in the GIII Knickerbocker H. at Aqueduct, Thorn Song raced close to the pace while three wide, was in hand to the eighth pole and wore down Cosmonaut for his first graded-stakes success.
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