Never in Mariners history had one run taken so long — or felt so good. And never before had their pre-eminent prankster had the tables turned on him. Pinch-hitter Ken Griffey Jr. — who had spent some of the first 13 innings with his cap characteristically on backward as he cheered from the bench — lined a single off the right-field wall with two outs in the bottom of the 14th to give Seattle a…