In the next few months, the Diamondbacks are likely to acquire a relief pitcher, probably via trade or waiver claim. And it is possible that Jordan Montgomery or Ryne Nelson start the season pitching long relief. Let’s look at how we can compare a new pitcher acquisition to the existing relief pitchers.
Statistics to compare relief pitchers.
My view is that saves and ERAs are poor statistics to compare relief pitchers. There are five statistics that can more meaningfully compare relief pitchers. They are Got-The-Job-Done (GTJD) (no earned runs and no inherited runners scored), percentage shutdown games (at least .