The rugged Flyers defenseman, an 18-year NHL veteran, five-time All-Star, and winner of the Hart and Norris trophies in 2000 took a stick to the eye during a game against Toronto on October 24, 2011. After sitting out six games, he returned and was hit hard into the boards in Phoenix. Trying to play two nights later in Winnipeg, he had to leave due to concussion symptoms and has not played since. With his NHL career likely over, Pronger spoke to SI.com's Brian Cazeneuve about his physical and emotional ordeal. You can watch the video by CLICKING HERE Here are 17 more notable cases of NHL careers cut short by head injuries.