[andkenneth]

Can't wait for the stories of how this broke baseball analytics software that assumed that a single player will never play for both teams in a match.

[recursivecaveat]

It has happened in the NBA before: https://www.basketballnetwork.net/old-school/the-only-nba-pl...

[joshka]

Pour one out for those using composite keys :D

[et-al]

Falsehoods programmers believe about sports