As reported by Ian Browne of MLB.com on Saturday, Red Sox manager John Farrell is already talking about replacements for Thornburg in the eighth inning if he isn’t ready for the start of the season, naming Joe Kelly as a prime candidate. Thornburg hasn’t pitched in a Spring Training game since March 1; he allowed seven earned runs in 1.1 spring innings before being shut down. Link The article goes on to make a great point. The Red Sox have spent an awful lot on relievers that haven't helped them or have under performed under Dombrowski. In light of questionable reliever trades, it’s also worth bringing up the haul that the San Diego Padres got from the Red Sox for closer Craig Kimbrel. The centerpiece of the deal was outfielder Manuel Margot, who is currently ranked No. 23 on MLB.com’s Top 100 Prospects list. The package also included minor-league prospects Logan Allen, Carlos Asuaje, and Javier Guerra. Kimbrel was good, but not his usual dominant self in his first season with the Red Sox, recording 31 saves with a 3.40 ERA and missing time in the middle of the season with a knee injury. In total, the Red Sox have traded away nine players for what’s supposed to be the top-three spots in their bullpen (plus Elias). That’s a lot to give up for three pitchers who have all had their share of injury issues in recent years. Bullpen depth could be the achilles heal of this team. It's worth keeping an eye on Thornborg's progress or lack of progress. Given that he hasn't pitched in 3 weeks it is hard to imagine he breaks camp with the Sox.