Grab your baseball glove to work out like a Mariner at FanFest Sunday at Safeco Field. Run around the bases, catch balls in the outfield, test your skills in the batting cage and speed pitch and hone your skills at the “Felixing,” that is, striking last season’s famous pose of Felix Hernandez celebrating his perfect game. There’s a zip line across the outfield, clubhouse tours, Kids Zone activities, the Moose and Mariner players on hand to greet fans and sign autographs, 11 a.m.-4 p.m. Sunday, Safeco Field, 1250 First Ave. S., Seattle; $10 but free for those ages 14 and younger. For more information, go to seattle.mariners.mlb.com.