Red Sox reliever Hirokazu Sawamura aiming to elevate his game

Hirokazu Sawamura adapting to Major League Baseball

Bullpen or bust? Red Sox will go only as far as top relievers take them, National Sports

Is a better baseball the best solution for MLB's sticky situation? Hirokazu Sawamura thinks it might be - The Boston Globe

Offseason In Review: Boston Red Sox - MLB Trade Rumors

MLB roundup: Cardinals edge Padres for 8th straight win

Hirokazu Sawamura's early outings aren't encouraging, but Red Sox expected an adjustment period - The Boston Globe

Boston Red Sox five-game winning streak New York Yankees

Is a better baseball the best solution for MLB's sticky situation? Hirokazu Sawamura thinks it might be - The Boston Globe

ODDS and EVENS] Former NPB Pitcher Hirokazu Sawamura Picks Up Win for Red Sox after COVID-19 Break

Boston Red Sox roster moves: Hirokazu Sawamura (tricep) placed on injured list, Phillips Valdez called up from WooSox