The 1979 Seattle Mariners season was the franchise's third since its creation. The Mariners ended the season in sixth place in the American League West with a record of 67–95 (.414). The Mariners hosted the All-Star Game on Tuesday, July 17.

The 1979 Major League Baseball All-Star Game was the 50th playing of the midsummer classic between the all-stars of the American League (AL) and National League (NL), the two leagues comprising Major League Baseball. The game was held on July 17, 1979, at the Kingdome, the home of the Mariners. The National League defeated the American League, 7–6.

Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in

Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in

Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts

1979 Major League Baseball All-Star Game