A colt by Curlin who is a full brother to multiple Grade 1 winner Clairiere sold for $5 million to Mandy Pope’s Whisper Hill Farm to headline Tuesday’s powerhouse day of trade at the Keeneland September Yearling Sale. The price is the highest paid for a colt at the September Sale since Meydan City sold for $11.7 million in 2006. Sixteen yearlings brought seven figure prices today, the