Juan Diego Estrada Constantino (born 1989 in Chilchota, Michoacán) is a Mexican-American long-distance runner. He competed in the 10,000 metres at the 2012 Summer Olympics in London for Mexico. After some confusion about his eligibility after becoming a U.S. citizen, he was excluded from the U.S. Olympic trials even though it was later known that Estrada was misinformed on his eligibility possibilities. Estrada resides in Flagstaff, Arizona. He became eligible to represent the United States internationally in May 2014.