Answered January 12th, 2020

Since 1960, Barry Bonds has the most weighted runs created when he has had more than 0 (100*BB/SO) and with 300+ plate appearances in a season, with 200 weighted runs created in 2001.

most 100*bb/so wrc in a season 300 pa since 1960
Interpreted as:
most 100*bb/so wrc by a player in a season 300 or more pa since 1960

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