Free agent Orix Buffaloes closer Yoshihisa Hirano is poised to sign a two-year deal with the Arizona Diamondbacks, an informed source said Friday.The 33-year-old right-hander, who primarily throws a fastball and splitter, has saved 156 games for the Buffaloes in Japan's Pacific League since moving out of the rotation in 2010. Hirano was 3-7 with 29 saves and eight holds in 2017, when he posted a 2.67 ERA.Hirano, who chose to play for Orix as a premium pre-draft signing in 2005, began his career as a starter. After his second season in 2007, detached cartilage was discovered in his pitching …READ FULL ARTICLE