A rival team has an ambitious but craven assistant coach who, with a regime change, could be better controlled towards our interests.
Another team's key player couldn't be replaced on short notice, were they to be removed from the board, in a deniable 'gang-related' incident in front of the nightclub they frequent.
The roster of a favored team could be boosted with secret financial incentives to candidates, funded off-the-books by new gambling and prostitution operations.