Amerman homebred Test Score (c, 3, Lookin At Lucky--Joy of Learning, by Kitten's Joy), second to Zulu Kingdom (Ire) (Ten Sovereigns {Ire}) in the GI American Turf Stakes at Churchill Downs May 3, got his own Grade I day in the sun Friday, winning Saratoga's $750,000 Belmont Derby Invitational Stakes in convincing style. For his part, Zulu Kingdom won the GIII Manila Stakes at the Spa one race prior to Test Score's Belmont Derby win. The Amermans won the Belmont Derby for the second consecutive year---they had Trikari (Oscar Performance)...