Zepeda was born in Ensenada, Baja California, and moved to Tijuana soon afterward due to his father's job.
[2] He also competed in sport shooting, winning a gold medal in the 13–14-year-old category at the 2011 Olimpiada Nacional [es] (National Olympics).
[3][4] Zepeda began playing American football at the age of 14; his middle school physical education teacher convinced him to join the team, which he coached.
[8] His performance earned him an invitation to participate in the National Football League (NFL)'s International Player Pathway Program (IPPP) in 2022 alongside 12 other prospects.
[7] In October 2022, Zepeda once again attended an NFL International Combine, this time held in London at Tottenham Hotspur Stadium.
[3] He earned his undergraduate degree in industrial and systems engineering before enrolling in the Master of Finance program at the EGADE Business School in 2021.