SEATTLE — More than 12 years after the Mariners lured him out of Melbourne, Australia, Astros lefthander Travis Blackley was back at Safeco Field on Monday. He didn’t necessarily expect to end his career here, but he never could have imagined all the stops on his journey. In a sense, Blackley is a walking baseball cliché, a journeyman too in love with the sport to quit and too hungry to give it up. Almost nine years after he became only the sixth pitcher in Mariners history to start and win his major league debut, Blackley returned to Seattle with more baseball organizations than career victories on his résumé. He was [.]