13 Years After Safeco Field Opens, The Mariners Move The Fences InJack Dickey10/02/12 7:25pm17EditPromoteGo to permalinkThe Mariners announced today that they're moving the fences in at Safeco Field. 13-year-old Safeco Field. The same Safeco Field where Ken Griffey and Bret Boone and Edgar Martinez played. The stadium that hosted Cal Ripken's last All-Star Game. Weird, right? But it's actually the thing to do now.