Small question: how are you converting wOBA to runs? I thought the formula (for good framers) would be .0053/1.27 * 38 PA * 130 G = 20.6 runs.

]]>Bad framers mean projection was -19.6 runs per 150 games (5700 PA caught). Their wOBA with was .3296 and without was .3256 for a difference of .004 or -20.3 runs.

Good framers mean projections was +18.6. wOBA with was .3202 and without was .3249 for a difference of .0053 or +26.9 runs.

The rest were -.2 runs projected, with wOBA of .3272 and without, .3274. or +1 run.

]]>I think the takeaway from the numbers is that we have evidence (empirical data only gives us evidence and never “proof”) that the impact of framing from what we can project is likely large.

Maybe I’ll throw some other years in it to increase the sample size. Not sure how far back the BP data goes.

]]>On the other end of the spectrum, this study seems to suggest there are some truly bad framers. Based on wOBA allowed, the bad framers are costing their teams .20 RA9, or -27 runs (!) over 130 games.

]]>Bad framers: w/wOBA .335 w/o wOBA .329

Good framers: w/wOBA .323 w/o wOBA .326

The rest: w/wOBA .327 w/o wOBA .328