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yesterday

Diego Seguí, Inaugural Seattle Pilots and Mariners Pitcher, Dies at 87

Teams in Boston and Seattle are honoring his pioneering baseball career with tributes that recall the resilience he drew from his Cuban heritage.

Diego Segui #26 of the Oakland Athletics pitches against the Baltimore Orioles during an Major League Baseball game circa 1968 at Memorial Stadium in Baltimore, Maryland.
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Overview

  • Diego Seguí died on June 25, 2025, at age 87, the Seattle Mariners announced with no further details released.
  • He became the only pitcher to start inaugural games for both the Seattle Pilots on April 8, 1969, and the Mariners on April 6, 1977.
  • Over a 15-season MLB career, Seguí played for six teams including the Athletics, Senators, Cardinals and Red Sox.
  • He led the American League with a 2.56 ERA in 1970 and finished his major league tenure with a 92-111 record and a 3.81 ERA in 639 games before pitching in Mexico through 1984.
  • The Boston Red Sox and Mariners released statements mourning his passing and Bob Kendrick recalled honoring him with a Negro Leagues Beisbol Lifetime Achievement Award in 2024.