Ned Louis Colletti, Jr. is the senior adviser to the president of the Los Angeles Dodgers. He previously was general manager of the Dodgers from 2006 through 2014. Before moving to the Dodgers, he was assistant general manager of the San Francisco Giants.

Colletti graduated from East Leyden High School in Franklin Park, Illinois, and attended Triton College before graduating from Northern Illinois University. He was inducted into the Triton College Sports Hall of Fame in 1993, the same year as the Major League players Kirby Puckett, Lance Johnson and Jeff Reboulet.

In 1982, Colletti began his Major League career with the Chicago Cubs. He was a member of the front office when the Cubs won the National League East in 1984 and 1989. Colletti was honored with Major League Baseball's Robert O. Fishel Award for Public Relations Excellence in 1990.

Colletti left the Cubs and joined the front office of the San Francisco Giants in 1994 as director of baseball operations. He was promoted to assistant general manager in October 1996. During his tenure, the Giants had an 813–644 overall record (.558), winning an average of 90.3 games per season. He was hired by the Los Angeles Dodgers in 2005. During his tenure with the Dodgers (2005-2014), Colletti had the highest winning percentage of any general manager in the National League.