The West Orange-Stark senior was unresponsive as he was taken off the field midway through the second quarter and was pronounced dead at the hospital shortly after.
Garrett's coach, Dan Hooks, said his player appeared to suffer a seizure. He had just thrown his second touchdown pass of the night before collapsing.
Word about his death reached the stadium as the two teams finished the game, but the players hoped it was just a rumor.
"I saw him come off the field, and he was kind of, 'Yay, good shot.' He was happy," Hooks said. "That was all. There wasn't any major reaction."
Garrett was a two-year varsity starter.
Sad, sad news.