by Jessica Martini, Christina Bossinakis, and Jill Williams LEXINGTON, KY-The Keeneland September Yearling Sale had its first seven-figure transaction just an hour into its first session Monday and, when the dust had settled after a frenetic day of bidding, 14 yearlings had sold for $1 million or more. The group was led by a $2.2-million son of Gun Runner who sold to Mandy Pope's Whisper Hill Farm from the Four Star Sales consignment. The colt was one of five by the Three Chimneys stallion to sell for seven figures during...