WASHINGTON (AP) — With steroids easy to buy, testing weak and punishments inconsistent, college football players are packing on significant weight — 30 pounds or more in a single year, sometimes — without drawing much attention from their schools or the NCAA in a sport that earns tens of billions of dollars for teams.

Rules vary so widely that, on any given game day, a team with a strict no-steroid policy can face a team whose players have repeatedly tested positive.

An investigation by The Associated Press — based on dozens of interviews with players, testers, dealers and experts and an analysis of weight records for more than 61,000 players — revealed that while those running the multibillion-dollar sport believe the problem is under control, that is hardly the case.