>>44 >>46
ここに書いてるね
https://www.fangraphs.com/library/defense/uzr/

抜粋すると

2〜3ヶ月や50試合程度の小さなサンプルサイズでは評価指標としての役割は果たさない
その選手の真の守備力を把握したいのなら3年分のUZRデータを用いるべき

The other thing to remember is that UZR isn't going to work well in small sample sizes, especially a couple of months or less.

Beware of sample sizes!
If a player only spent 50 innings at a position last season, it'd be a good idea not to draw too many conclusions from their UZR score over that time.
Like with any defensive statistic, you should always use three years of UZR data before trying to draw any conclusions on the true talent level of a fielder.