On Foul Trouble

Good stuff for those who like tactics theory.

Final note: Conventional wisdom seems to regard foul management as a risk vs. safety decision.  You will constantly hear something like, “a big decision here, whether to risk putting Duncan back in with 4 fouls.”  This is completely the wrong lens for the problem, since the “risky”* strategy is, with the caveats mentioned, all upside!  Coaches dramatically underrate the “risk” of falling behind, or losing a lead, by sitting a star for too long.  To make it as stark as possible, observe that the coach is voluntarily imposing the penalty that he is trying to avoid, namely his player being taken out of the game!  The most egregious cases are when a player sits even though his team is significantly behind.  I almost feel as though the coach prefers the certainty of losing to the “risk” of the player fouling out.  There may be a “control fallacy” here: it just feels worse for the coach to have a player disqualified than to voluntarily bench him, even if the result is the same.  Also, there is a bit of an agency/perception problem: the coach is trying to maximize keeping his job as well as winning, which makes him lean towards orthodoxy.

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