Jeff Nelson is a former Major League Baseball pitcher who played for six different teams during his career. He was known for his tall stature and his ability to throw a variety of pitches, including a fastball, curveball, and slider.

Nelson began his professional career in 1984 when he was drafted by the Los Angeles Dodgers. He spent several years in the minor leagues before making his MLB debut with the team in 1992. However, he was traded to the Seattle Mariners later that year and spent the next five seasons with the team.

During his time with the Mariners, Nelson became known as one of the best relief pitchers in the league. He was a key member of the team's bullpen and helped them reach the playoffs in 1995 and 1997. He also earned his first All-Star selection in 1995.

In 1998, Nelson signed with the New York Yankees as a free agent. He spent four seasons with the team and was a part of their championship teams in 1998, 1999, and 2000. He was a reliable setup man for closer Mariano Rivera and helped the team win several close games during their playoff runs.

After leaving the Yankees, Nelson played for several other teams, including the Seattle Mariners (again), Texas Rangers, and Chicago White Sox. He retired from baseball in 2006 with a career record of 48-45 and an ERA of 3.41.

Overall, Jeff Nelson had a successful career as a relief pitcher in Major League Baseball. He was known for his consistency and his ability to perform in high-pressure situations. He was also a valuable member of several championship teams and earned the respect of his teammates and opponents alike.