Pass Interference or Not? No One in the N.F.L. Seems to Know - The New York Times
By the numbers: How the coach's challenge continues to evolve in the NHL – The Athletic
By the numbers: How the coach's challenge continues to evolve in the NHL – The Athletic
Coach's Challenges Are Coming To The NBA – CBS Boston
NFL will consider allowing coaches to challenge all penalties - ProFootballTalk
Irate Jason Garrett, an unsportsmanlike conduct penalty and how a lack of challenges eventually burned the Cowboys
Proposal to allow NFL coaches to challenge penalties ready to be debated
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How Successful Is Your Coach With The Coach's Challenge? - Winging It In Motown
Bill Belichick: Why not let coaches challenge everything? - ProFootballTalk
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How Successful Is Your Coach With The Coach's Challenge? - Winging It In Motown
The “Challenge System” – Blessing or Curse? - Stregspiller
By the numbers: How the coach's challenge continues to evolve in the NHL – The Athletic
2020 Super Bowl: What are NFL challenge rules?
Penalty for failed offside challenge among NHL rule changes
NHL announces rule changes for video review, coach's challenge
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How Successful Is Your Coach With The Coach's Challenge? - Winging It In Motown
Two-minute penalty proposed for failed offside challenge
Mark Followill on Twitter: "So approval of the coach challenge has officially been announced for the upcoming NBA season. Here are the parameters… https://t.co/b70LgOtyN3"
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How Successful Is Your Coach With The Coach's Challenge? - Winging It In Motown
NBA allows coach's challenge, replay center reviews | ABS-CBN News
New NHL rules forcing coaches to think twice before challenging plays | Calgary Sun
Get it right, NHL coaches, or get 2 minutes | CBC Sports
OHL Adds Coach's Challenge, Offside Replays, and Penalty Reviews for 2019-20 - Scouting The Refs
NBA coaches are trying to navigate the league's new 'coach's challenge' program - SFChronicle.com
By the numbers: How the coach's challenge continues to evolve in the NHL – The Athletic
