The Red Sox have called up left-handed reliever Tommy Layne from Triple-A Pawtucket, sources have told WEEI.com.
Layne has struggled at times with his control this season but has otherwise been solid with a 5-1 record, 1.50 ERA and 53 strikeouts in 48 innings. He also pitched 2/3 of a shutout inning for Boston during a brief stint with the team in early July.