From –, he played for the
Seibu Lions in
Nippon Professional Baseball. After the 2005 season, he was acquired by the
Tampa Bay Devil Rays through the
posting system. Originally slated to compete for the Devil Ray's
closer job during the
MLB season, he tore the
labrum in his
shoulder and missed the entire season. He was subsequently released by the Devil Rays. Returning to Japan, in 2009 Mori joined the
Ishikawa Million Stars of the
semi-pro Baseball Challenge League as a pitcher-coach. After retiring from playing, he took over as the manager of the Million Stars in 2010, staying through the 2014 season. He returned to active duty as a player in 2013, and was the Million Stars'
player-manager in 2013–2014. ==Death==