![NHL knocks out hard-hitting concussion comments](https://m.media-amazon.com/images/I/81ENu+n4ysL._AC_UF1000,1000_QL80_.jpg)
The Hardest Hit: A Sam the Hockey Player Novel
![NHL knocks out hard-hitting concussion comments](https://www.usatoday.com/gcdn/-mm-/234277e4a869b3061ef924215b57720c598e873b/c=0-363-3000-2059/local/-/media/USATODAY/USATODAY/2014/03/09//1394382550000-kari-lehtonen-injury.jpg?width=660&height=374&fit=crop&format=pjpg&auto=webp)
Stars' Kari Lehtonen leaves vs. Wild with head injury
![NHL knocks out hard-hitting concussion comments](https://static01.nyt.com/images/2011/03/11/sports/11hits_337-span/HITS1-articleLarge.jpg?quality=75&auto=webp&disable=upscale)
N.H.L. Faces New Scrutiny for Hockey Violence - The New York Times
![NHL knocks out hard-hitting concussion comments](https://dims.apnews.com/dims4/default/a80d58b/2147483647/strip/true/crop/3000x1688+0+156/resize/1440x810!/quality/90/?url=https%3A%2F%2Fstorage.googleapis.com%2Fafs-prod%2Fmedia%2F4085ace88dc14909bfcc13803334885f%2F3000.jpeg)
Stars uncertain about Joe Pavelski after hard hit by Wild
![NHL knocks out hard-hitting concussion comments](https://smartcdn.gprod.postmedia.digital/winnipegsun/wp-content/uploads/2021/06/ws20210603kk41.jpg?quality=90&strip=all&w=400&sig=CpnhywnLMFtWLyzBkC-pmg)
Jets coach Paul Maurice says NHL set precedent with 'excessive
![NHL knocks out hard-hitting concussion comments](https://www.tsn.ca/polopoly_fs/1.1098046!/fileimage/httpImage/image.jpg_gen/derivatives/landscape_620/nhl-under-oath-pat-lafontaine.jpg)
NHL knocks out hard-hitting concussion comments
![NHL knocks out hard-hitting concussion comments](https://www.vmcdn.ca/f/files/shared/feeds/cp/2023/04/2023041800040-643e16a913e57c97e30bb832jpeg.jpg)
Stars uncertain about Joe Pavelski after hard hit by Wild
![NHL knocks out hard-hitting concussion comments](https://external-preview.redd.it/roni-hirvonen-leaves-training-camp-after-open-ice-hit-v0-Y2N1cm9pbGR2cmFiMQGd5ju5ynBBy8vBWr0307mxZm4ZITYFYEq7QWjpUMvx.png?width=640&crop=smart&format=pjpg&auto=webp&s=7e555b005c488cf143febe27524249c614159fbb)
Roni Hirvonen leaves training camp after open ice hit : r/nhl
![NHL knocks out hard-hitting concussion comments](https://i.guim.co.uk/img/media/1f36981f53eda3b870b52cff50e210d8328ebd4a/0_0_4542_2722/master/4542.jpg?width=1200&height=900&quality=85&auto=format&fit=crop&s=44ade4c76e48eb1dd57809b6c623ba2e)
How NHL refs played by the tough guy code and are now paying the
![NHL knocks out hard-hitting concussion comments](https://smartcdn.gprod.postmedia.digital/ottawacitizen/wp-content/uploads/2017/01/former-nhl-player-eric-lindros-during-a-skate-at-north-toron.jpeg?quality=90&strip=all&w=400&sig=jXwa6jWbfeLDhrHjM_lD5w)
Concussions have ended many NHL careers far too soon
![NHL knocks out hard-hitting concussion comments](http://img.washingtonpost.com/rf/image_960w/2010-2019/Wires/Images/2017-05-06/AP/Penguins_Capitals_Hockey_30527-9f894.jpg)
Sidney Crosby concussion fears spawn confusion, questions and
![NHL knocks out hard-hitting concussion comments](https://s.yimg.com/ny/api/res/1.2/E7YSBNQ3IJPIE3zEBgxGkA--/YXBwaWQ9aGlnaGxhbmRlcjt3PTEyMDA7aD02NzU-/https://s.yimg.com/os/creatr-uploaded-images/2021-06/9e753f90-c41a-11eb-bfff-89cbe9865ef8)
NHL: Mark Scheifele ejected for dirty hit on Jake Evans