Diego Pablo Segui Gonzalez
- Bats Right, Throws Right
- Height 6' 0", Weight 190 lb.
Not only did he pitch in the opening day game for the both expansion Seattle Pilots in 1969 and for the expansion Seattle Mariners in 1977, he is the only player to have played for both teams in Seattle. Segui went 12-6 with the Pilots, mostly out of the bullpen. As the oldest M's player, he earned the nickname "The Ancient Mariner".
A valuable role pitcher for several teams, Segui was a swingman who pitched well in relief but could also fill a spot in the rotation and give his manager an occasional complete game. In addition to the Pilots and Mariners, Segui pitched for the Kansas City and Oakland Athletics, Washington Senators, St. Louis Cardinals, and Boston Red Sox. He was a member of the Sox's 1975 World Series team, then pitched for the Hawaii Islanders of the Pacific Coast League in 197], going 11-5 with a 3.18 ERA. He had also been a member of the original Islanders team in 1961.
Dwight Evans played with both Diego and David Segui.
- Joanne Hulbert: "Diego Segui", in Bill Nowlin and Cecilia Tan, ed.: '75:The Red Sox Team that Saved Baseball, SABR, Phoenix, AZ, 2015, pp. 119-124. ISBN 978-1-933599-97-7
- Joanne Hulbert: "Diego Segui", in Chip Greene, ed.: Mustaches and Mayhem, Charlie O's Three-Time Champions: The Oakland Athletics 1972-74, SABR, Phoenix, AZ, 2015, pp. 302-306. ISBN 978-1-943816-07-1