Trevor Rosenthal’s path to Yankees roster won’t be easy

OAKLAND, Calif. — Trevor Rosenthal has had a miserable season pitching for the Nationals and Tigers, but that doesn’t mean the right-handed reliever has no chance of reaching the big leagues with the Yankees when rosters expand Sept. 1. The 29-year-old Rosenthal signed a minor league contract with the Yankees on Tuesday. The Yankees already…