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The Red Sox will promote Booser from Triple-A Worcester on Friday, Ian Browne of MLB.com reports.
Booser has struck out 15 batters and walked just one while posting a 2.70 ERA and 0.65 WHIP across 6.2 innings at Triple-A this season. The 31-year-old southpaw will provide depth to a badly injured Red Sox pitching staff and will be making his MLB debut once he gets into a game.
