2020 Super Bowl: What are NFL challenge rules?
New NHL replay rules already impacting the Penguins' decision-making | Pittsburgh Post-Gazette
Irate Jason Garrett, an unsportsmanlike conduct penalty and how a lack of challenges eventually burned the Cowboys
Bucs coach Bruce Arians threw illegal challenge flag to make point
By the numbers: How the coach's challenge continues to evolve in the NHL – The Athletic
NBA coaches are trying to navigate the league's new 'coach's challenge' program - SFChronicle.com
NFL will consider allowing coaches to challenge all penalties - ProFootballTalk
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How Successful Is Your Coach With The Coach's Challenge? - Winging It In Motown
NHL makes important change to offside challenge | RSN
Get it right, NHL coaches, or get 2 minutes | CBC Sports
NBA allows coach's challenge, replay center reviews
The “Challenge System” – Blessing or Curse? - Stregspiller
NHL considering failed offside challenge penalty - TSN.ca
NBA allows coach's challenge, replay center reviews | ABS-CBN News
/cdn.vox-cdn.com/uploads/chorus_asset/file/13657917/Rplot04.jpeg "How Successful Is Your Coach With The Coach's Challenge? - Winging It In Motown")
How Successful Is Your Coach With The Coach's Challenge? - Winging It In Motown
OHL Adds Coach's Challenge, Offside Replays, and Penalty Reviews for 2019-20 - Scouting The Refs
Two-minute penalty proposed for failed offside challenge
Coach's Challenges Are Coming To The NBA – CBS Boston
NHL announces rule changes for video review, coach's challenge
New NHL rules forcing coaches to think twice before challenging plays | Calgary Sun
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How Successful Is Your Coach With The Coach's Challenge? - Winging It In Motown
Proposal to allow NFL coaches to challenge penalties ready to be debated
