Masterson Faces Sox in Possible Breakout Year

Justin Masterson, whom the Sox traded for Victor Martinez and who faces his old team tonight, is having what might be a breakout year for him. He's 5-2 with a 1.22 WHIP and a 2.52 ERA. Opposing players are hitting .249 / .318 / .321 off of him, with that last number being most impressive of all. He has given up just one home run in 60+ innings over 9 starts this year. I wonder if Theo wishes we still had him.