There is a somewhat recent school of baseball nerd thought which suggests that relievers are all, basically, the same. Replacing relievers is easy and the life of a relief pitcher is volatile, so why bother paying top dollar? The Rays are a team which (ordinarily) employ this method of bullpen construction to great effect – they often turn over their ‘pen greatly from season to season without missing a beat.
As with most good ideas, the belief that “replacing relievers is easy” gave rise to a perversion of the original vision: the flippant attitude that relievers are essentially worthless gained traction among “analysts” and the like. Any old chump off the scrap heap can fill-in, heaven forbid a team sign a reliever in free agency!
That relievers are abundant and can all provide reasonable approximations of each other is obviously not true. Building a good bullpen isn’t easy as it often requires a crystal ball as much as scouting acumen. The one thing there can be replacement for in the bullpen is depth. Be it injury or ineffectiveness, having plenty of good pitchers ready to step in and accept an increased role is crucial over the 162 game season.
The Boston Red Sox are putting this idea to the test and it is only May, as members of their vaunted bullpen are suddenly dropping like flies.





