It's seemingly official, according to ESPN.com.
My quick take: While some have suggested that this is a dumb, or at least very premature move by Rodriguez given that he's likely to get a better offer from the Yankees than anyone else given the Rangers' subsidy on any extension he takes, I think this truly is a situation where money isn't everything. Yes I know that saying such a thing about A-Rod and Boras is to ignore everything we know about them, but I also think that everyone is underestimating just how much crap A-Rod has gone through in the past year or two.
For years he has been told that he is not a "true Yankee" and was booed by his home crowd as recently as this past April. If he was never a Yankee, tabloid reporters never would have been following him in Toronto. His wife never would have been humiliated (and she never would have been called out for her choice of t-shirts). If he's never a Yankee, about 100,000 words aren't written calling his character, fortitude, clutchiness, and manliness into question. In short, A-Rod's life has been pretty damn miserable in New York for the past few years, even if much of that misery was brought on himself.
Against that backdrop, I can very easily see a person a fraction as sensitive as A-Rod is typically made out to be saying "I am the best ballplayer in the world, and no matter what I do here, I am still going to be a target. F*ck them. I don't need them. I don't want them. I'll hit my 50 homers in SoCal or Detroit or someplace, go home each night without anyone tailing me, and wake up each morning without having to read I'm a loser. Scott -- opt out now."
And you know what? I don't blame him.