A parent league is a persistent container that ties a fantasy league’s individual seasons together under a single identity, so that its history, members, and side games carry forward year to year rather than resetting each season.

The problem it solves is continuity. On most platforms a “league” is really one season — start a new year and you get a fresh object with no memory of who won the title two seasons ago or how the rivalry records stand. A parent league keeps that thread: it owns the roster of members and their roles, points at each season’s underlying fantasy league, and is where multi-year standings and records live.

In LeagueSide the parent league is the top-level object everything hangs off of. Each season under it links to the actual fantasy league it mirrors — a Sleeper league, for example — and the parent is where Pick’em, Survivor, and career records are stored, so a commissioner manages one durable league identity instead of a disconnected pile of yearly ones.