As Bob Johnson explained in this Bowlers Journal column back in 2012, the American Bowling Congress in the early years of the ABC Tournament (now the USBC Open Championships) had a bizarre rule called the Alleyman Rule.
Early ABC leaders tried to discourage professional bowling and the Alleyman Rule limited a team to one player who earned the majority of his income from bowling, but that included proprietors, adult pinboys, and even bartenders who worked in a bowling center, as Johnson...