Sources
Every article and quiz question on YieldYearn Sports is written to reflect the official rules published by the governing body of that sport. Here's the full list we reference.
| Sport / Area | Reference |
|---|---|
| American Football | NFL Official Rulebook |
| Basketball | NBA Official Rules |
| Baseball | MLB Official Baseball Rules |
| Ice Hockey | NHL Official Rules |
| Soccer | IFAB Laws of the Game |
| Tennis | ITF Rules of Tennis |
| Track & Field | World Athletics Competition Rules |
| Swimming | World Aquatics Swimming Rules |
| Olympic Format | International Olympic Committee (IOC) Olympic Charter |
| Boxing | Unified Rules of Boxing |
| Golf | USGA / R&A Rules of Golf |
| Motorsport | FIA Motorsport Regulations |
| Volleyball | FIVB Official Volleyball Rules |
| Cricket | ICC Playing Conditions |
| Rugby | World Rugby Laws of the Game |
Each individual quiz question also lists its specific source alongside the answer explanation. If a rule varies by league or competition level, we describe it in general terms rather than asserting a single universal figure.
Something Look Off?
Rules change. If you believe a rule we've described is outdated or inaccurate, please tell us via our Corrections page.