Leonel "Leo" Manzano (born September 12, 1984) is a Mexican-American former middle-distance track and field athlete specializing in the 1500 m and mile.

[5] During a recruiting trip to the University of Texas, Austin, Manzano went on a training run with several runners on the track and field team.

Manzano's early talent did not go unnoticed, earning him a spot on the track and field team for the University of Texas, where he won five NCAA National Championship titles, earned All American nine times and holds four school records, including the indoor mile (3:58.78), 1,500 meter (3:35.29), and indoor and outdoor distance-medley relay.

He is the first Longhorn to ever make the U.S. Olympic team in the 1,500 meter and remains the most decorated athlete ever in the history of Track and Field at the University of Texas.

Manzano became the first American to medal in the 1500 m since Jim Ryun won silver in Mexico City 1968, breaking a 44-year drought for the U.S. men's middle distance running.

2014 Leonel Manzano won another 1500 meter title in 3:38.63 at the 2014 USA Outdoor Track and Field Championships[8] in Sacramento, California.