Brooks was born Jan. 22, 1996 in Mississauga, Ontario, Canada. He grew up in Canada but played a portion of his high school ball in Henderson, Nevada at Findlay Prep. Other Canadians, including Tristan Thompson, Cory Joseph and Anthony Bennett also played there. Coming out of high school, he was a four-star, top-80 recruit according to ESPN. Brooks majored in general social science in college at Oregon. Follow him on Twitter (@dillonbrooks24).