Argilagos took up boxing in 2007 at the age of 10. He is fighting at amateur level for the World Series of Boxing, under the auspices of the (amateur) International Boxing Association. He has won the 2013 AIBA Junior World Championships, the 2015 AMBC American Confederation Boxing Championships, and the 2015 AIBA World Boxing Championships in light flyweight. He also won a silver medal at the 2015 Pan American Games and a bronze at the 2016 Olympics.