Robert Allen Nen (born November 28, 1969) is a former Major League Baseball right-handed relief pitcher. He spent most of his career as a closer. He is the son of former major league first baseman Dick Nen. He currently works in the Giants' front office as a special assistant to General Manager Farhan Zaidi. Nen is best known for his years with the San Francisco Giants (1998–2002), with whom he was a three-time All-Star and played in the 2002 World Series. He also played with the Texas Rangers (1993) and Florida Marlins (1993–97); in 1997, Nen won the World Series championship with the Marlins. Nen has 314 career saves with the Marlins (1993–1997; 108 saves) and Giants (1998–2002; 206 saves). He was 8th overall in career saves when he retired, and stands 21st at the end of the 2017 season.Nen wore number 31 as his jersey number throughout his career.