Diomedes Antonio Olivo Maldonado
- Bats Left, Throws Left
- Height 6' 1", Weight 195 lb.
- Debut September 5, 1960
- Final Game June 12, 1963
- Born January 22, 1919 in Guayubin, Monte Cristi, D.R.
- Died February 15, 1977 in Santo Domingo, Distrito Nacional, D.R.
Remembered in the USA only as a curiosity, a 41-year-old rookie, Diomedes Olivo was a legend in the Dominican Republic, where he played from 1951 to 1961, winning the most valuable pitcher award six times in that period. One website chooses him as a pitcher on the all-time-best foreigner team (of players who played virtually their entire career outside of the major leagues). He had previously helped the Dominican national team to a Silver Medal in the 1946 Central American and Caribbean Games, their first appearance in baseball in the Central American and Caribbean Games. He was 2-0 with a 0.99 ERA in the event.
He wasn't just a curiosity for major league batters. In 1960, he appeared in 4 games with an ERA of 2.79. In 1962, he appeared in 62 games (only Roy Face had more appearances on the team with 63). Olivo had an ERA of 2.77, a record of 5-1, and 7 saves. He recorded 66 strikeouts in 84 1/3 innings. He was by far the oldest player on the Pirates - the second oldest was Harvey Haddix, who was 36.
He managed the Panamanian national team in the 1971 Amateur World Series. He was undersecretary in charge of sports for the Dominican Republic when he suffered a fatal heart attack in 1977. He died only two weeks after his brother Chi-Chi Olivo. He was also the father of Gilberto Rondon, who was the fruit of a relationship with a Puerto Rican woman he met while playing for the Senadores de San Juan in the winter of 1952-53. He was elected to the Latino Baseball Hall of Fame as part of its 2012 class.
- Rory Costello: "Diomedes Olivo", in Clifton Blue Parker and Bill Nowlin, ed.: Sweet '60: The 1960 Pittsburgh Pirates, SABR, Phoenix, AZ, 2013, pp. 167-172. ISBN 978-1-93359-948-9