A brouhaha has erupted in the wake of an ESPN
report that seems to implicate the Toronto Blue Jays in using some sort of relay (a now infamous "man in white") to steal signs, which would be in contravention of the rules of baseball. You'll note I say "seems to implicate," because ESPN doesn't have any sort of actual proof that the Jays have stolen signs illegally, more like rumour and conjecture; the article by Amy K. Nelson and Peter Keating is at various points subtitled "The Blue Jays deny they're stealing signs - evidence may lead to another conclusions" and "Baseball's Toronto Blue Jays under suspicion again of stealing signs at Rogers Centre."
The evidence offered essentially breaks down to anonymous player reports (seemingly from a single bullpen), statistical cherrypicking, and the extreme unusualness of the Jay's 2010 offensive season. None of these on their own are convincing, but according to ESPN when put together they mean that "every pitch to a Blue Jay in Toronto is worth watching" which is of course meaningless pablum, but which again seems intended to implicate that the Jays are doing something illegal or unethical.
So are the Blue Jays stealing signs illegally? I have no honest idea. I'm sure they are relaying pitch location from second base with runners on; plenty of teams do that, and the Jays seems to be at the forefront of that. I'm willing to acknowledge that it's within the realm of possibility that the Jays are even going farther than that - not especially likely, but not completely improbably either. Mostly though, I think it's unfortunate that ESPN decided to run with what seems like at best a highly circumstantial set of allegations that are not backed up by it's own reporting. Let's review.