NHL considering failed offside challenge penalty - TSN.ca
NBA coaches are trying to navigate the league's new 'coach's challenge' program - SFChronicle.com
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How Successful Is Your Coach With The Coach's Challenge? - Winging It In Motown
NHL announces rule changes for video review, coach's challenge
Get it right, NHL coaches, or get 2 minutes | CBC Sports
Bucs coach Bruce Arians threw illegal challenge flag to make point
What can NBA coaches challenge during games? Explaining the new rule for the 2019-20 season | Sporting News
NBA allows coach's challenge, replay center reviews | ABS-CBN News
NBA Board of Governors approves coach's challenge, use of NBA replay center to initiate instant replay | NBA.com
By the numbers: How the coach's challenge continues to evolve in the NHL – The Athletic
NFL will consider allowing coaches to challenge all penalties - ProFootballTalk
Replay review in gridiron football - Wikipedia
Irate Jason Garrett, an unsportsmanlike conduct penalty and how a lack of challenges eventually burned the Cowboys
By the numbers: How the coach's challenge continues to evolve in the NHL – The Athletic
NHL makes important change to offside challenge | RSN
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
NBA allows coach's challenge, replay center reviews
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NBA Board of Governors passes “Coach's Challenge” rule for 2019-20 - Pounding The Rock
OHL Adds Coach's Challenge, Offside Replays, and Penalty Reviews for 2019-20 - Scouting The Refs
Penalty for failed offside challenge among NHL rule changes
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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
