Fan favorite Rated R Superstar (Kodiak Kowboy), a 13-time winner of over $1.8 million in a career that spanned nine seasons at the racetrack, has been retired and will take up residence at Old Friends Farm in Georgetown, Kentucky, according to a series of tweets from Allison Caldwell, the wife of trainer Danny Caldwell. Rated R Superstar began his career in the barn of Ken McPeek and was third to Brody's Cause (Giant's Causeway) in the 2015 GI Claiborne Breeders' Futurity before finishing unplaced behind Nyquist (Uncle Mo) in the...