Nick and Joey Bosa's great-grandfather was Tony Accardo, Al Capone's personal bodyguard, and later the head of the Chicago mob for about 40 years. Joey and Nick embrace training for flexibility and pliability, rather than old-school weight lifting.
https://www.sbnation.com/nfl/2016/4/...cago-al-capone
https://www.si.com/nfl/2019/04/18/ni...bosa-nick-bosa