BOSTON – A common theme emerged among Red Sox pitching additions this winter: they were all strike-throwers. Coming off a 2022 season in which the Red Sox bullpen walked 9.9 percent of batters faced — allowing the fifth-most walks in the American League, and by far the most walks in the AL East — a club priority was to acquire pitchers with better command. Advertisement That led to signing Corey Kluber, whose 3.0 percent walk rate was best in the majors last season and lowest of his career. Meanwhile, bullpen additions Kenley Jansen, Chris Martin, Joely Rodriguez and Richard Bleier…