It's been a dream return to Major League Baseball for Washington Nationals pitcher Foster Griffin. After flaming out during his previous big league stint and going overseas to reinvent himself, the left-hander decided to come back stateside when he signed a one-year, $5.5 million contract with the Nationals this past offseason. Nobody quite knew what to expect out of Griffin. While he had a prosperous run in Japan with the Yomiuri Giants of Nippon Professional Baseball, which included an All-Star selection in 2025, it's hit-or-miss when it comes to a player having success when they return to the majors. But for the 30-year-old, it has gone smoothly. And following his latest start on Friday, Griffin now leads MLB left-handed starters in ERA.…