THE BIG HURT: Health scores that don't tell the whole story

BaseballHQ's health scores do a very good job of identifying health risk. Here’s a synopsis of the 2019 results by health grade (based on the 1,205 players identified in the 2019 Straight Draft Guide):

Health Score Breakdown

Grade  % IL Trips  Avg IL Days
=====  ==========  ===========
  A        42%         10.2
  B        71%         14.9
  C        66%         16.1
  D        63%         20.1
  F        81%         25.6

Health scores didn’t perfectly predict the odds of hitting the IL, though if we group them, 47% of players with A or B health scores hit the IL in 2019, while 72% of players with C, D, or F health scores hit the IL. Health scores did predict quite well, however, the average days on the IL. And if we just look at the...

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