A Preview of 2015 Team Defenses
It’s gettin’ to that time of year when folks tend to preview stuff ’round baseball. Our annual Positional Power Rankings will be coming to the site over the next couple weeks, you’ll surely see all sorts of divisional preview pieces pop up between now and Opening Day, and this right here is going to be a preview of team defenses.
We saw last year where a good defense can take a team. The Kansas City Royals were more than just a great defense, but it was evident, especially during the playoffs, how much an elite defense can mean to a ballclub. The same was true, but on the other end of the spectrum, for the Cleveland Indians. Our two advanced defensive metrics — Defensive Runs Saved and Ultimate Zone Rating — agreed that the defense in Cleveland was worth around -70 runs last season. In Kansas City, it was something like +50. That’s a 120-run difference! That’s about 12 wins! Those teams play in the same division! Move 12 wins around and the result is an entirely different season! Defense isn’t the biggest thing, but it’s a big thing. Let’s look ahead.
All the numbers used in this piece will come from UZR and DRS. For the team projections, I simply utilized our depth charts and did a little math. We’re going to take a look at the three best, the worst, the teams that got better, the teams that got worse, and then all the rest down at the bottom. For the upgrades/downgrades, I used the difference of standard deviations above or below the mean between last year’s results and this year’s projections.
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