Despite never having raced on the dirt in his two seasons at the races, Mrs John Magnier, Michael Tabor and Derrick Smith's champion and 'TDN Rising Star' City of Troy (Justify) was assigned gate three as the 5-2 morning-line selection in a full field of 14 and will be ridden by Ryan Moore in Saturday's $7-million GI Longines Breeders' Cup Classic at Del Mar. Deemed by trainer Aidan O'Brien--a two-time runner-up in the Classic (Giant's Causeway, Declaration of War)--'the best he's ever trained,' the son of G1SW Together Forever (Ire)...