Examining possible ranges of outcomes: Relief Pitchers

Photo by Billie Weiss/Boston Red Sox/Getty Images With that out of the way, I’m going to spend the rest of this article talk about projections, because what else do we have?! There are a lot of different projection systems out there these days, which is a good thing because no one system is perfect but the more data points you can throw into a sample the more useful the information you do have should be. Baseball Prospectus’s PECOTA system is one of the most famous systems and has been around forever at this point, and again while it’s not perfect it is one of my favorites.

Specifically, I love that PECOTA doesn’t just publish the 50 percent projection. That is still their main output, but…