Warning!! Danger!! Annual Off-topic Baseball Thread '07!! Beware!!

[rainmaker]

I'm usually just a lurker on this thread, but I have a real, bona fide baseball question. I watched the last four innings of the Seattle-Oakland game today (slept through the first five) and in the 6th inning the first base ump ended up tossing the first base player, Sexton, I think? They replayed everything from several different angles, and the announcers couldn't see any reason for the player being tossed, but I'm not sure how good they are at understanding officials. Did anyone see it? Could anyone explain to to me from the official's point of view?