Growing up, Juan played soccer (7 years), football (2 years), water polo (4 years), and swam competitively (9 years). He participated in club boxing at University of California, Berkeley, and played water polo for one year at Ohlone College. Juan has ran multiple marathons and triathlons. He also enjoyed participating in indoor bouldering leagues in Chicago. Times for his marathons, ultramarathon, and triathlons are listed below.