The forward fractured his ankle and leg in the first quarter of the game after going for an alley-oop.
The injury shook up players, coaches and the entire arena as people watched in silence and others prayed.
Hayward was carted off the court on a stretcher and gave a thumbs up.
Outrage soon stirred on social media after a tweet by Fox Sports TV personality Skip Bayless.
Minutes after Gordon Hayward went down with a leg injury, one-half of the sports show Undisputed tweeted about LeBron James and his legacy.
In full disclosure, Bayless' first tweet was about Hayward's injury.
The outrage began with Toronto guard DeMar DeRozan, followed by Rudy Gay, who called him a "clown" for the tweet.
Others criticized Bayless for having a "sick obsession" with James.
ESPN reported Hayward is expected to undergo MRI and CT exams Wednesday.