from Amazon
Friday, February 18, 2011
Effects of concussions
Whoah, great stuff from Jeff, with a nearly 40 point drop in wOBA! That is enormous, turning an average player into a replacement-level player.
As you know, I’m skeptical of any claim from anyone that can find a split effect in any category that is more than the handedness effect (20 points in wOBA). And one would think that returning from a concussion means that you’ve had enough rest before coming back. Clearly, that’s not the case. I would like to see a longer-term trend in terms of how long before the player finally has recovered. It’s no surprise that your performance is much worse following a concussion. It does seem to me to be a surprise that your performance is this much worse after given the selective rest you needed (or thought you needed enough of).
This is huge no? That you might simply say “you need at least 30 days off” or something before being allowed back on the field.