OAKLAND, Calif. – A’s left-hander Jared Koenig got the kind of run support Sunday that some of his fellow starting pitchers have only sparingly enjoyed. Seth Brown and Sean Murphy both homered to help lead the A’s to a 4-0 win over the Kansas City Royals on Father’s Day, giving Oakland an all-too-rare win at the Coliseum this season. Brown hit a solo home run in the first inning and Murphy added a three-run homer in the sixth, as the A’s (23-45) salvaged the last game of the three-game set before a crowd of 14,341 and improved to 8-25 at home this season. The A’s have now scored three or more …