Play Hard,
Learn Smart.
Sportmentary is a free sports encyclopedia with more than 1,500 plain-English guides. Each guide explains the rules, positions, techniques and drills of a sport so beginners can get started and experienced players, parents and coaches can check the details. Rules pages are checked against the official rulebooks of governing bodies such as the NFHS, NCAA, FIH, BWF, World Rugby, United World Wrestling and the NHL.
Browse guides by sport
- Badminton guides
- Ballet guides
- Baseball guides
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- Boxing guides
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- Cycling guides
- Field Hockey guides
- Fitness guides
- Football guides
- Golf guides
- Gymnastics guides
- Ice Hockey guides
- Lacrosse guides
- MMA guides
- Muay Thai guides
- Pilates guides
- Roller Hockey guides
- Rugby guides
- Running guides
- Soccer guides
- Softball guides
- Tennis guides
- Track & Field guides
- Volleyball guides
- Wrestling guides
Popular guides
- Double Minor Penalties in Ice Hockey: Rules, Timing & Power Plays
- Wrestling Mat Dimensions: High School, College & Olympic Sizes
- Wrestling Weight Classes: High School, College & Olympic (2025-26)
- How to Start in Referee’s Position in Wrestling
- How to Do a Reverse Half-nelson
- Folkstyle Wrestling Referee Hand Signals and Point Values
- Field Hockey Rules and Regulations: A Complete Beginner Guide
- How to Defend a Penalty Corner in Field Hockey
- Offensive Penalty Corners in Field Hockey: Roles, Rules & Set Plays
- How to Take a Penalty Stroke in Field Hockey
- Field Hockey Formations and Positions Explained
- Badminton Rules and Regulations (Including the New 15-Point Scoring)
- Common Offensive Football Formations Explained
- Gaps and Holes in Football: How the Numbering System Works
- Rugby Scrum Explained: Positions, Rules and How It Works
- Cutoffs and Relays in Softball: Who Goes Where
- Basketball Cheers and Chants for Cheerleaders
- Football Cheers and Sideline Chants for Cheerleaders
How we keep guides accurate
Rules change often. When a governing body updates its rulebook, we update the affected guides and cite the source at the bottom of the page. If you spot something out of date, please let us know.
