Interesting move. ESPN actually has a seemingly forward attitude to this sort of "technical" info in sports. They have a regular segment called "Sports Science" where they bring in athletes and hook them up to monitors and measure their output. Unfortunately, this just skims the surface in terms of the actual science since there are no write-ups or documentation on how the data was collected. Hopefully we can get some real stats in written form from Silver like we saw when he was at the NYT.
They really don't actually. The best stuff is from independent analysts, or guys like Fangraphs or Tom Tango or MGL. ESPN throws some lipservice to this crowd because some hard-core fans like myself are sabr-types, but the brunt of their coverage is aimed at the "DEREK JETER KNOWS HOW TO WIN BECAUSE HE's A VETERAN" Crowd.