You may be right. The term "upgrade" may be a misnomer (though I didn't use it in the post you quoted). "Graded" they do get. I read once how it all works, and I think they can get a +1 or something (I think it's in one of Markbreit's books, not sure) for a really good call under pressure. I may be misremembering.
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"And I'm not just some fan, I've refereed football and basketball in addition to all the baseball I've umpired. I've never made a call that horrible in my life in any sport."---Greatest. Official. Ever.
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