A depth chart is the order a team plays its people at each position. First name at a slot is the starter. Second is the primary backup. Third is emergency duty or a specialist. That's the whole idea — a ranked list, position by position, of who's in front of whom.

Who actually makes it

Depends on the league. Some teams publish an official chart; plenty publish one that's deliberately vague to avoid tipping their hand. Most of what fans read is assembled by beat reporters and data providers from practice reps, snap counts, personnel groupings and what coaches say out loud. That's why two sites can show the same team differently — they're reading the same tea leaves.

Official vs. real

An official chart tells you what a team is willing to say. The real chart shows up on Sunday in the snap counts. When those two disagree, believe the snaps. A "co-starter" listing usually means a committee, and a committee is a fantasy problem no matter whose name is printed first.

How often it changes

Constantly. Training camp reshuffles it, one injury rewrites it, and a bad month can bury a starter by midseason. A depth chart is a snapshot with a short shelf life — which is exactly why checking it the day you set a lineup beats trusting the version you memorized in August.

Why anyone outside a front office should care

Because opportunity is the single biggest driver of fantasy scoring, and the depth chart is opportunity, written down. A player's talent sets his ceiling. His place on the chart sets whether he ever gets near it.