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SIERA calculation incorrect (?)
It seems like at least for past data (like 2021 season) the SIERA is not calculated correctly. The SIERA from real life websites is vastly different (like 1-1,5 more or less). E.g. The D'backs pitchers Bumgarner, Kelly, Weaver have a much better SIERA in-game for the 2021 season than the real life SIERA.
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