Keenan was born in Grand Rapids, Michigan, on May 2, 1989, as the second of three children.[4] He attended Ottawa Hills High School in Grand Rapids, where he was a four-year letterwinner and an all-city selection in football.[4] He was also an all-city selection in basketball and led his team to a 16–4 record while averaging 15 points, 10 rebounds and two assists per game as a senior.[4]
Keenan signed with the Institución Atlética Larre Borges in Uruguay in 2011 and averaged 23 points and 11 rebounds per game in his first season, leading the league in scoring.[5] He had a stint with the Panteras de Miranda in Venezuela before returning to Uruguay to join Club Trouville.[5]
Keenan is the son of Vernon Keenan Jr. and Zsa Zsa Keenan. He has his right arm tattooed with the Chinese letters 强者生存 ("The Strong Survive").[9] He suffered from Wolff–Parkinson–White syndrome in 2012.[10]