The Boston Red Sox have one of the best overall bullpens in baseball and yet it could be even better. The bullpen has been one of the few parts of the organization that has been successful all season to this point. Boston is 15-21 on the season, but the bullpen has been cooking. The Red Sox enter the day on Wednesday with the sixth-best bullpen ERA in baseball at 3.40. When you have guys like Aroldis Chapman (0.77 ERA), Tyler Samaniego (0.00 ERA in nine appearances), or Jovani Morán (3.10 ERA in 11 appearances), that's going to happen. What should excite the Red Sox fanbase is the fact that the bullpen could be even better soon. Boston has a few struggling relievers on its hands, like Ryan Watson with a 6.10 ERA in 14 outings. One of the club's best relievers isn't with the club right now in Justin Slaten, as he's on the Injured List. Slaten had a 0.00 ERA in four appearances before he was placed on the Injured List. Slaten landed on the 15-Day Injured List due to a right oblique strain on April 8.…