The Seattle Mariners 1990 season was their 14th since the franchise creation, and ended the season finishing 5th in the American League West, finishing with a record of 77-85.
November 13, 1989: Jeff Schaefer was signed as a free agent by the Mariners.
June 2, 1990: Randy Johnson threw a no-hitter versus the Detroit Tigers. Johnson was the first Mariner to throw a no-hitter. He was also the tallest pitcher in Major League history to throw a no-hitter. It was the 2101st game in Mariners history.
September 4, 1990: Ken Griffey Sr. and Ken Griffey, Jr. hit back-to-back home runs in a game against the California Angels. It was the first and only time in Major League Baseball history that this ever happened.
Scott Bankhead
Greg Briley
Darnell Coles
Alvin Davis
Brian Giles
Ken Griffey, Jr.
Jeffrey Leonard
Pete O'Brien
Harold Reynolds
Dave Valle
June 4, 1990: 1990 Major League Baseball Draft
Marc Newfield was drafted by the Mariners in the 1st round (6th pick). Player signed June 10, 1990.
Bret Boone was drafted by the Mariners in the 5th round. Player signed June 8, 1990.
June 18, 1990: Darnell Coles was traded by the Mariners to the Detroit Tigers for Tracy Jones.
June 19, 1990: Mario Díaz was traded by the Seattle Mariners to the New York Mets for Brian Givens.
August 29, 1990: Ken Griffey, Sr. was signed as a free agent by the Mariners.
September 18, 1990: Rick Rentería was released by the Mariners.
Ken Griffey, Sr. joined his son Ken Griffey, Jr. to become the first father and son to play in a game together. The game was played against the Kansas City Royals on August 31. The Griffeys became the first father-and-son teammates. He also hit back-to-back home runs with his son on September 14, 1990.
August 31, Kingdome, Seattle, Washington
Note: Pos = Position; G = Games played; AB = At Bats; H = Hits; Avg. = Batting Average; HR = Home Runs; RBI = Runs Batted In
