KINGSTON, Jamaica — Talented Jamaican sprinter Sanjay Seymore of William Knibb High was shown a yellow card and cautioned for unsportsmanlike conduct after winning the Under-20 200m at the Carifta Games Trials on Sunday. Seymore won in 20.95 but earned the wrath of the officials after showboating near the end, where he looked across twice to his right at Deequan Maragh of Camperdown, who was second in 21.06. President of the Jamaica...