MEMPHIS — Warriors guard Ian Clark had his jersey retired Friday evening by his alma mater, Germantown High School, in Germantown, Tenn. Because Golden State was already in Memphis for Saturday night’s game against the Grizzlies, Clark was able to bring some of his famous friends to the on-campus ceremony. Clark, the school’s first NBA player, averaged 16.2 points, 5.7 rebounds and 3.4 assists over his four Germantown seasons (2005-09).