From beat writer Scott Lauber of the Boston Herald:
After a meeting this morning with Joel Hanrahan, manager John Farrell believes the Red Sox have identified a reason for the embattled closer’s early-season struggles.
Hanrahan has been dealing with soreness in his right hamstring since his second appearance of the season in New York, Farrell revealed today. And although Farrell called the situation “manageable,” he also conceded that it appears to have affected Hanrahan’s mechanics, specifically the drive he has been able to generate with his legs.
Hanrahan, who was acquired this offseason in a six-player trade with the Pirates, has surrendered six earned runs on six hits and five walks over his first 4 2/3 innings with Boston. The Red Sox will stay away from him for the next few days, using Andrew Bailey at closer instead. The rest should do Hanrahan some good.