Attended Chuo University in Tokyo...According to Baseball-Reference, is the first player from the school ever to appear in MLB, as well as the only player born in Tochigi to play in the majors...According to Baseball-Reference, Sawamura is also the only MLB player to attend Sano Nihondai High School in Japan.
Made the Sox’ Opening Day roster and spent the entire season in the majors, going 5-1 with 10 holds and a 3.06 ERA (18 ER/53.0 IP)...Ranked fourth among AL rookies in pitching appearances (55) and fifth in holds (10)...Among the 35 AL rookies who threw 50.0+ innings, he ranked fifth in ERA (3.06)...In 26 home games, allowed only 1 HR and went 4-0 with a 2.08 ERA (6 ER/26.0 IP)...In 29 road games, gave up eight HR and posted a 4.00 ERA (12 ER/27.0 IP)...Led the majors with an average velocity of 91.6 MPH on his splitter (min. 100 splitters thrown)...Of the 85 splitters thrown at 93.0+ MPH in the majors last season, he accounted for 69 of them (81.2%)...Stranded 29 of 35 inherited runners, including 15 in a row from 6/25-8/17...Among ML pitchers with 30+ inherited runners, ranked 4th in inherited runners scored percent (17.1)...Made his big league debut in the season opener on 4/2 vs. BAL...Worked a scoreless ninth inning and fanned Austin Hays for his first ML strikeout...In his first five games, allowed 0 runs and one hit in 5.1 IP (1-for-16, 0.94 WHIP, .063 AVG)...Earned his first ML win on 4/23 vs. SEA (1.1 IP, H, 3 SO)...Faced 42 consecutive batters without issuing a walk between 4/18-5/20...In his debut against the Yankees (6/4 at NYY), struck out five of seven batters faced with one BB over 2.0 scoreless IP...In his final 22 games leading into the All-Star break (5/11-7/11), was 3-0 with a 1.61 ERA (4 ER/22.1 IP) and a .181 opponent AVG (15-for-83)...On the injured list with right tricep inflammation from 7/20-30...Made one rehab appearance with Triple-A Worcester...Also was on the COVID-19 Related IL from 8/31-9/13...Helped the Sox clinch a Postseason berth by throwing 1.2 scoreless innings in the season finale (10/3 at WSH)...Entered the third inning with one out and the bases loaded and got Jordy Mercer to ground into a double play.
POSTSEASON: Made the Red Sox’ ALCS roster and pitched in Games 1, 3, and 5...Threw a perfect ninth inning in Game 3 vs. HOU (W, 12-3).
Began the season with Yomiuri...made 13 appearances before being traded to the Chiba Lotte Marines on 9/8...In 22 games for Chiba Lotte, posted a 1.71 ERA (4 ER/21.0 IP) with 29 SO and a 0.95 WHIP.