Gossage signed with the Seattle Mariners for the 1994 season. On August 4, , Gossage became the third pitcher in major league history to appear in 1,000 games. Gossage entered a game against the California Angels with two out in the seventh inning and runners on second and third base, trailing 2–1; he picked up the win when the Mariners scored three times in the eighth for a 4–2 victory. In his final major league appearance on August 8, he earned a save of three innings—his first in over 15 months—in the Mariners' 14–4 win over the Rangers, retiring all nine batters he faced; José Canseco flied out to left field to end the game.