Defending champion Houston, the Miami Marlins and the Texas Rangers clinched Major League Baseball playoff berths with triumphs on Saturday while Arizona and Toronto also secured post-season spots.Also on the penultimate day of the six-month season, the Rangers jumped ahead by five runs in the fourth inning on the way to a 6-1 victory at Seattle to clinch their first AL playoff berth since 2016 and ensure a place for the Toronto Blue Jays.