squad numbers
... that the Brazilian team at the 1958 World Cup had not assigned squad numbers in advance, and a 17-year old Pelé was randomly assigned the number 10, which he wore for the rest of his career?
... that the <a href="./Brazil_national_football_team" id="mwENM" rel="mw:WikiLink" title="Brazil national football team">Brazilian team</a> at the <a class="mw-redirect" href="./1958_World_Cup" id="mwENQ" rel="mw:WikiLink" title="1958 World Cup">1958 World Cup</a> had not assigned <b id="mwENU"><a href="./Squad_number_(association_football)" id="mwENY" rel="mw:WikiLink" title="Squad number (association football)">squad numbers</a></b> in advance, and a 17-year old <a href="./Pelé" id="mwENc" rel="mw:WikiLink" title="Pelé">Pelé</a> was randomly assigned the number 10, which he wore for the rest of his career?