LOS ANGELES — Three days after signing reliever Trevor Rosenthal to a minor league contract, the Yankees landed right-handed reliever Cory Gearrin off waivers Friday from the Mariners and added him to the 40-man roster. The 33-year-old Gearrin worked 48 games (two starts) for the Mariners this season and was 0-2 with a 3.92 ERA....