Beyond your starters and bench, three roster mechanisms shape how you weather a season: the taxi squad for developing young players, injured reserve for surviving injuries, and auto-subs for the weeks life gets in the way.
Taxi squad
Taxi slots stash developmental players outside your active roster. By default only rookies are eligible, and leagues can widen that to players with 2 or fewer years of NFL experience, or to all players. A separate setting caps how many years of experience a player may have before he must clear the taxi squad, and taxi contracts count 50% of their salary against your cap by default, with full, reduced or zero cap treatment all configurable. Promote a taxi player to the active roster whenever you're ready; his full salary applies from then on.
Leagues can also lock the taxi squad, from week 1 or from the trade deadline, so nobody reshuffles developmental players once the season that matters is underway. There is no lock by default.
Injured reserve
Moving an injured player to IR frees his roster spot while keeping him on your team. IR salaries count fully against the cap by default, with separate configurable treatment for short-term and season-ending IR. To keep IR honest, return rules apply: players must stay on IR at least 2 weeks by default before returning, IR moves lock during the game-day window, and leagues can cap IR returns per season or set a designation deadline week.
Auto-subs
Auto-subs (off by default; commissioners enable them) let you designate 1–3 bench players a week to automatically replace a starter who's ruled OUT or moved to IR before kickoff. Leagues can extend the triggers to DNP and bye weeks, and can require the sub's game to start no earlier than the starter's, so nobody gains an information edge from a late swap.
Max Points For
Capr tracks Max Points For, the score your optimal lineup would have posted each week, alongside your actual score. The gap between them is your lineup efficiency, and it's the honest measure of whether your problem is your roster or your start/sit calls. IR and taxi players count toward Max PF by default, so stashed points show up in the math.