August 17, 1937 |
|Batted: Right||Threw: Right|
|April 12, 1962 for the Kansas City Athletics|
|Last MLB appearance|
|September 24, 1977 for the Seattle Mariners|
|Earned run average||3.81|
|Career highlights and awards|
During a 16-year baseball career, Seguí played for the Kansas City Athletics (1962–1965; 1967), Washington Senators (1966), Oakland Athletics (1968, 1970–1972), Seattle Pilots (1969), Boston Red Sox (1975–1976), and Seattle Mariners (1977). He batted and threw right-handed. His son is former Major League Baseball first baseman David Seguí. David had a very successful 15-year baseball career, playing from 1990 to 2004 for seven different teams, including the Mariners, from 1998 to 1999.
Professional career 
Seguí holds the unique distinction of having pitched for both of Seattle's major league baseball teams, the Pilots and the Mariners, in the first game ever played by each franchise (earning a save for the Pilots in 1969, and absorbing the opening-day loss for the Mariners in 1977). His most productive season came in 1969, for the Pilots, when he posted a career-high in wins, with 12, and 12 saves, against only 6 losses. At the end of the season, his teammates voted him the Pilots' Most Valuable Player. In 1970 with Oakland, he won 10 games as reliever and starter, and led the American League pitchers with a 2.56 ERA.
Seguí was the starting pitcher in the Mariners' inaugural game in 1977, earning him the nickname "the Ancient Mariner." Although he set a Mariner record against the Boston Red Sox with 10 strikeouts early in the season, he failed to get a win. After compiling a 0–7 record with a 5.69 ERA, he was released at the end of the season. He continued pitching in the Mexican League for another 10 years, tossing a no-hitter for the Cordoba Coffee Growers in 1978.
Diego Segui was inducted into the *Venezuelan Baseball Hall of Fame and Museum in 2003. He also gained induction into the Hispanic Heritage Museum Hall of Fame on August 19, 2006 in San Francisco, California.
See also 
- List of players from Cuba in Major League Baseball
- List of Major League Baseball ERA champions
- List of Major League Baseball all-time saves leaders
- Baseball Library - profile and chronology
- Career statistics and player information from Baseball-Reference
|Opening Day starting pitcher
for the Seattle Mariners
|American League ERA Champion