Green grew up in Peoria, Illinois and attended Peoria High School, where he was a member of the baseball, football, and wrestling teams. Green was named first-team All-State as a senior after recording 113 tackles, including 33 for a loss, 15 sacks and four forced fumbles as Peoria won the 2016 IHSA 5A state championship. Green committed to play college football at Illinois over an offer from Iowa.
