Los Angeles Dodgers rookie Roki Sasaki on Tuesday expressed optimism about his return from the right shoulder impingement that has kept him on the injured list since mid-May.The 23-year-old former Lotte Marine, scheduled to throw three simulated innings on Friday, told reporters he is "pain-free and relieved of anxiety" as he continues his rehabilitation."We've found the cause of the pain," said the flamethrower, who is 1-1 with a 4.72 ERA having started eight games for the Dodgers."I'm focusing on the technical side of things and definitely heading in the right direction."Sasaki claimed hi…READ FULL ARTICLE