When Willie Mays joined the Giants roster, Artie Wilson was demoted. Allegations of what have largely been accepted as the cause of Wilson's demotion?

When Willie Mays joined the Giants roster, Artie Wilson was demoted. Allegations of what have largely been accepted as the cause of Wilson's demotion?

A message sent by the Giants ownership after his request to avoid signing Mays was ignored by the general manager

Interpersonal conflict between Mays and Wilson

An informal quote system limiting the number of Black players on the roster

A league$-$wide mandate on the number of Negro League players than AL$/$NL teams cost sign in a given year