Robb Nen, American baseball player and manager
Robb 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 pitched for the Florida Marlins (1993–97); in 1997, Nen won the World Series championship with the Marlins. He also played with the San Francisco Giants (1998–2002), with whom he was a three-time All-Star and played in the 2002 World Series, and the Texas Rangers (1993).

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 24th overall as of June 25, 2021.