"A memorable scene from the 1987 movie The Untouchables focuses upon a lavish private banquet hosted by Chicago underworld boss Al Capone (played by Robert De Niro). To drive home his point about the paramount importance of loyalty and teamwork, Capone bashes in the skull of an untrustworthy underling with a baseball bat.

"Capone’s bat handling skills were grounded in experience – he was an avid amateur and semipro ballplayer during his teenage years in Brooklyn. A first baseman-pitcher who batted and threw righthanded, the future crime lord even captained an eponymous nine in 1918, the Al Capone All-Stars. The paragraphs below explore this little-known aspect of Capone’s life before surveying his higher-profile connection to the game in Chicago."

https://sabr.org/bioproj/topic/al-capone-a-life-in-baseball/