CU: Stewart's injury regrettable – The Denver Post
Watch: Giorgio Chiellini cripples Bukayo Saka with horse-collar tackle – Thick Accent
NFL approves expansion of horse-collar rule - ProFootballTalk
NFL changes rules including 'horse collar tackles' for 2016 - Movie TV Tech Geeks News
Mike Pereira: The horse collar flag on Jameis Winston's injury was the right call I Last Call | FOX Sports
Cowboys safety Williams suspended for horse-collar tackle | Reuters.com
PETA urges NFL to call audible on term 'horse-collar tackle' | Fox News
Horse-collar rule will be a point of emphasis in 2012 - ProFootballTalk
Dallas' Williams Appeals Game Suspension for Tackle
Football Horse Collar Penalty
Horse collar penalty stirs up controversy in BC Lions loss (VIDEO) | Offside
Horse-collar tackles are now even more off limits with expanded definition in rules
Adam Jones Denies Horse Collar Tackle - Cincy Jungle
Alabama Crimson Tide defensive back Jarrick Williams (bottom) is penalized for a horse collar tackle on Texas A&M quarterback Johnny Manziel in the second half of their NCAA SEC football game at
Horse Collar Tackle – Rochester Chapter of Certified Football Officials
Report: Troy Polamalu fined $15,000 for horse-collar tackle of Ricky Williams - The Washington Post
Football Horse Collar Penalty
Horse-collar tackle - Wikipedia
NFL approves expansion of horse-collar rule - ProFootballTalk
PHOTO: Here's a list of what NFL players can be fined for in 2014 - CBSSports.com
PETA urges NFL to call audible on term 'horse-collar tackle' | Fox News
Origin of the Horse Collar
Horse collar exception for quarterbacks in pocket remains - ProFootballTalk