Related by context. Frequent words. (Click for all words.) 73 concussion 57 traumatic brain injury 51 injuries 47 injury 45 mild concussion 45 sustained concussion 45 suffered concussion 45 spinal injuries 44 sports hernia 44 broken bones 43 PTSD 43 fractures 42 wear helmets 42 migraine headaches 42 helmet 42 substance abuse 42 staph infection 42 commissioner Roger Goodell 41 Injury 41 nagging injuries 41 steroid 41 spinal cord injury 40 migraines 40 collisions 40 sprain 40 Lyme disease 40 NFLPA 40 sexual assaults 40 trauma 40 cyberbullying 40 CTE 40 ankle sprain 39 steroids 39 musculoskeletal 39 knee injury 39 absences 39 rib injury 39 blindside 39 surgically repaired 39 whiplash 39 Goodell 39 CT scans 39 sprained knee 39 performance enhancing substances 39 bacterial meningitis 39 Commissioner Roger Goodell 39 torn ACL 38 dislocated shoulder 38 helmets 38 fracture 38 Injuries 38 broken collarbone 38 illnesses 38 cyber bullying 38 turf toe 38 spinal cord injuries 38 hospitalizations 38 dementia 38 sexual abuse 37 athletic trainer 37 HGH 37 eating disorders 37 heat exhaustion 37 knee sprain 37 surgeries 37 stress fracture 37 suspensions 37 sleep apnea 37 SIDS 37 NFL 37 torn ligament 36 sexual assault 36 sexual misconduct 36 illness 36 ear infections 36 Lindros 36 autism 36 testicular cancer 36 whooping cough 36 neurological 36 hazing 36 contusion 36 bruised ribs 36 ephedra 36 brain hemorrhage 36 wearing helmets 36 bone bruise 36 lockout 36 sleep disorders 36 cognitive decline 36 wearing helmet 36 post traumatic stress 35 ADHD 35 plantar fasciitis 35 facial injuries 35 infractions 35 sexting 35 irregular heartbeat 35 neurologists 35 neurologist 35 performance enhancing