Eulalio RÃos had the following podium finishes at major championships: 1st in the 1955 Pan American Games 200 metre butterfly, 3rd in the 1955 Pan American Games 4Ã100 metre medley (with [Clemente MejÃa], [Walter Ocampo], and [Otilio OlguÃn]), 3rd in the 1959 Pan American Games 200 metre butterfly, 3rd in the 1959 Pan American Games 4Ã100 metre medley (with [Alejandro Gaxiola], [Jorge Escalante], and the non-Olympian Roberto Marmolejo).
Died circa 1980.
|1956 Summer||21||Melbourne||Swimming||Men's 200 metres Butterfly||Mexico||MEX||6|
|1960 Summer||25||Roma||Swimming||Men's 200 metres Butterfly||Mexico||MEX||5 h1 r2/3|
|1956 Summer||21||Melbourne||Swimming||Mexico||Round One||Heat Two||3||Q||2:28.1|
|1960 Summer||25||Roma||Swimming||Mexico||Semi-Finals||Heat One||5||2:24.2||1:08.7||8||1:15.5 (4)|
|1960 Summer||25||Roma||Swimming||Mexico||Round One||Heat Two||3||Q||2:22.0||1:07.3||=5||1:14.7 (3)|