Related by context. Frequent words. (Click for all words.) 37 concussions 36 helmets 35 NFLPA 34 athletic trainer 33 concussion 33 HGH 33 NFL 32 helmet 32 metal detector 31 commissioner Roger Goodell 31 ephedra 30 Goodell 30 Commissioner Roger Goodell 29 wear helmets 29 CTE 29 X ray machines 28 metal detectors 28 traumatic brain injury 28 night vision goggles 27 sports hernia 27 sonar 26 flashlights 26 performance enhancing substances 26 staph 26 TSA 26 neurological 26 walkie talkies 26 neurologists 25 concealed weapons 25 steroids 25 X ray machine 25 Lyme disease 25 sudden cardiac arrest 25 steroid 25 sleep apnea 24 scoliosis 24 binoculars 24 headphones 24 earplugs 24 mild concussion 24 background checks 24 GPS 24 wearing helmets 23 irregular heartbeat 23 detectors 23 taser 23 performance enhancing 23 ADHD 23 wristwatch 23 X ray 23 handgun 22 torn labrum 22 neurologist 22 sudden cardiac death 22 handguns 22 CT scans 22 flashlight 22 turf toe 22 surgically repaired 22 screeners 22 thermal imaging 21 spinal cord injury 21 firearms 21 bacterial meningitis 21 vending machine 21 touchbacks 21 .# caliber 21 scanners 20 staph infection 20 musculoskeletal 20 bone bruise 20 tape recorder 20 concussed 20 pat downs 20 testicular cancer 20 cognitive decline 20 GPS tracking 19 torn ligament 19 microphones 19 ear infections 19 x ray 19 migraines 19 body scanners 19 screwdriver 19 firearm 19 sprained knee 19 pepper spray 19 PTSD 19 blindside 19 stun gun 19 Secret Service 19 rifle 18 heatstroke 18 .# caliber handgun [002] 18 sustained concussion 18 gun 18 duffel bag 18 spinal cord injuries 18 waistband 18 plantar fasciitis 18 torn anterior cruciate ligament