Later this month, when Jackson Holliday accrues a week’ s worth of Triple-A plate appearances, he’ ll join a club of some of MLB’ s biggest names. Before they became stars in the big leagues, Bryce Harper, Ronald Acuña Jr., Vladimir Guerrero Jr. and Ozzie Albies did what Holliday is about to do. In late July, Orioles executive vice president and general manager Mike Elias.