Jeff Nelson was drafted in the 22nd round of the 1984 draft by the Los Angeles Dodgers and was later acquired by the Seattle Mariners in 1986. He made his major league debut for the Mariners in 1992, pitching 66 games out of the bullpen to a 3.44 ERA and earning six saves along the way in 81 innings pitched. Nelson spent four years with the Mariners, where he earned nine saves total. It was with the Mariners that Nelson got his first taste of the postseason, where he is currently second all-time in games pitched behind Mariano Rivera.