If one of Brandon Hyde’s players were to ask him the difference between the major leagues’ regular season and postseason, the Orioles’ manager would point to this weekend in Seattle as a close comparison. Baltimore’s mid-August meeting with the Mariners — featuring a consistently packed stadium, ace-level pitching and games where, as Hyde put it, “every little thing matters” — evoked thoughts of October in Hyde, who frequented the playoffs while on the Chicago Cubs’ coaching staff but has yet to reach them in five years guiding the Orioles.