You have to know math to calculate ERA, WHIP, slugging percentage and other statistics (you need advanced English to know what these abbreviations mean). Then there is the advanced math for those who belong to the Bill James school. You have to know how to calculate WHIP for day games when the weather is below 75 but above 50 that dont come out on a Tuesday, or how to calculate the odds that the pitcher will throw a slider on a 2-1 pitch to a left handed hitter with runners on 2nd and 3rd and less than 2 outs. A real gaon would even be able to figure out the ods that they will go with a suicide squeeze on said pitch.
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