Hippasus
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Richard, Orr, Gretzky, Yzerman, Lemieux, Ovechkin, Crosby: early 20s statistical peak.I think Crosby and Ovechkin tricked people into remembering players as peaking early. McDavid, Gretzky, Matthews, and many more had their most productive seasons at 26. That’s always been the athletic prime but some players are exceptions to the rule.
The majority of the rest, including Howe, Bobby Hull, Brett Hull, Jagr, Kucherov, Mackinnon: mid to late 20s makes sense.
There will always be exceptions like John Bucyk, Ray Whitney, and Tim Thomas.