is a Japanese professional baseball pitcher for the Chiba Lotte Marines of Nippon Professional Baseball (NPB). He previously played in NPB for the Yomiuri Giants and the Marines, and has played in Major League Baseball (MLB) for the Boston Red Sox. Listed at and , he throws and bats right-handed. Baseball career Sawamura played college baseball for Chuo University in Tokyo. On October 28, 2010, Sawamura was drafted by the Yomiuri Giants first overall pickin the 2010 Nippon Professional Baseball draft. Yomiuri Giants Sawamura played nine seasons for the Yomiuri Giants during 2011–2020; he missed the 2017 season due to a shoulder injury. In 2011, he was named the Central League Rookie of the Year. In 2013, he was named MVP of the first game of the NPB All-Star Series. During his first four seasons with the Giants, he was predominantly a starting pitcher; after 2014, he only appeared for the Giants as a relief pitcher. As a closer during 2015 and 2016, he recorded 36 and 37 saves, respectively. During his nine seasons with the Giants, he compiled a 48–50 win–loss record with 74 saves. Sawamura played for the Giants in three Japan Series, the annual championship series of NPB. He was the starting and winning pitcher of Game 2 in 2012, which the Giants went on to win in six games over the Hokkaido Nippon-Ham Fighters. He pitched as a reliever in 2013, when the Giants lost in seven games to the Tohoku Rakuten Golden Eagles, and in 2019, when the Giants lost in four games to the Fukuoka SoftBank Hawks. Chiba Lotte Marines On September 8, 2020, Sawamura was traded to the Chiba Lotte Marines. With the Marines in 2020, he appeared in 22 games, pitching to an 0–2 record with one save and a 1.71 earned run average (ERA) while striking out 29 batters in 21 innings pitched. After the season, Sawamura became a free agent. Boston Red Sox On February 16, 2021, Sawamura officially signed a two-year, $3 million contract with the Boston Red Sox of Major League Baseball (MLB). He made his MLB debut on April 2, pitching in relief against the Baltimore Orioles. He earned his first MLB win on April 23, after pitching innings of scoreless relief against the Seattle Mariners. Sawamura was placed on the injured list on July 23 due to right triceps inflammation; he returned to the Red Sox