re: Could the fake BMac join up with the real BMac in the Bronx?

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Did they really put a positive spin on a 2-10 record and a 5.11 ERA with sabermetrics?

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Well, sort of. His "headline" stats are not always indicative of his effectiveness as a pitcher. Take Jeff Samardzija for example. He's been near the top in pitching despite having a meh record. W/L record is a really bad way to evaluate a pitcher. ERA is decent, and more reliable than W/L, but you can really dig into sabremetrics to get a good read on tendencies. I could be wrong, but I see it as a way for stats to evaluate a pitcher without the results or the consequences of his defense. BABIP, K/9, BB/K, WHIP, FIP, Ground ball rate, line drive rate, fly ball rate...all good stuff.