Mark Melancon has been a very good closer for the Pirates. He's solidified the back-end of that bullpen, providing 2.5 and 2 WAR since joining Pittsburgh, although he's showing some signs of decline.
Brock Holt has shown that he can effectively play every position on the field at an average-or-better value (he's a pretty damn good outfielder). He reduces the bench load and was worth 2.3 wins last year. He's hit very well for a utility guy, meaning the Red Sox have not had to roster a no-bat reserve infielder like a Brendan Ryan.
edit: shit, I should have added a poll.
Brock Holt has shown that he can effectively play every position on the field at an average-or-better value (he's a pretty damn good outfielder). He reduces the bench load and was worth 2.3 wins last year. He's hit very well for a utility guy, meaning the Red Sox have not had to roster a no-bat reserve infielder like a Brendan Ryan.
edit: shit, I should have added a poll.