
So a replacement level team would win around 48 games if I remember correctly, so if you add all the players on a team you should have a good estimate of how many games the team will win.
The Mets as a team had a 41 WAR so that would equate to 89 wins and they won 83 games... obviously it isn't perfect but it provides a quality estimate.
I think it quite literally asses how many wins and value players add to their team... so it is "equating to wins"
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