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beanumber / openWARData

An R package consisting of data associated with openWAR
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Pitcher WAR no longer accurate #11

Open ercbk opened 6 years ago

ercbk commented 6 years ago

In 2013, both Baseball Reference and FanGraphs made a compromise and agreed on a definition of replacement player. So, now the current pitcher WAR values for both sites don't match this database anymore. Not aware of any other db that has the current values and currently working on a JAWS project. Would be eternally grateful if you could update. Thanks.

beanumber commented 6 years ago

@nllspc So wait, are the new values posted somewhere? I you send a URL we can investigate.

ercbk commented 6 years ago

As David noted a few minutes ago, this new unified replacement level is now set at 1,000 WAR per 2,430 Major League games, which is the number of wins available in a 162 game season played by 30 teams. Or, an easier way to put it is that our new replacement level is now equal to a .294 winning percentage, which works out to 47.7 wins over a full season. Conveniently, this number is almost exactly halfway in between our previous replacement level (.265) and Baseball-Reference’s previous replacement level (.320), though the number wasn’t chosen solely as an equal compromise.

Unifying Replacement Level