The Jammer Lap Point is Dead, A New Era of Defensive Roller Derby is Born | by The Apex | The Apex
You Just Can't Keep the Girls From Jamming - Roller Derby, Reborn - The New York Times
Jammer Flow Training: The “Poke-a-Jammer” drill! ☝️✨ Sometimes the best way to deal with a hit 💥 is to flow 🌊 through it! We used a moment of free time... | By
Roller derby: A glossary | silicon valley roller girls' blog
Jammer Quake: Rainy City's New Weapon | by The Apex | The Apex