Breaking Down the Pedro Alvarez Situation    Who is Julio
Borbon, and should he be really angry with Scott  Boras right
now? (Photo: Rich Anderson)  If Dejan Kovacevic got all the
details right, he should be really proud of this story, which is
very interesting and clear despite the situation being really
complex and without precedent, and despite the story only having
broken hours ago. Still, there are a couple details that need to
be teased out.  Basically, Kovacevic makes it sound like the
players' association will file a grievance. That grievance will
be argued before an arbitrator on September 10. If the
arbitrator decides in favor of Major League Baseball (which is
accused of "unilaterally" deciding to extend the draft signing
deadline past midnight), I take it that the Pirates' contract
with Alvarez will be binding. If the arbitrator decides in favor
of the players' association, then I assume there would have to
be some separate process to determine whether the Pirates and
Alvarez actually failed to ag