"I was watching the game when Hayward got injured, and after the initial shock, I thought it wouldn't be difficult to adjust my prosthetic to look like the injury," Caskey told WTVD.
"If I wasn't so sure that Hayward would rehab back and be as good, if not better, I wouldn't have done the costume. I mean, when you realize what it takes physically and mentally to make it that far in a sport, you have to realize that this injury won't keep that guy down."
Hayward suffered a dislocated left ankle and a fractured tibia just five minutes into his debut with the Celtics against the Cavaliers.
Gordon Hayward suffered a dislocated left ankle and a fractured tibia. Photo / Getty
Hayward, who signed a four-year, $128 million free agent contract this summer, went up for an alley-oop pass and collided with LeBron James midway through the first quarter. He got his leg twisted underneath him as came back to the floor. Hayward collapsed under the basket and looked in horror as his left foot was pointing outward.
