Stephen John Masiello Jr. (born September 2, 1977) is an American college basketball coach and a former player.

Masiello played collegiately as a walk-on at Kentucky for coaches Rick Pitino and Tubby Smith from 1996 to 2000.

Following the close of his college career, Masiello got his first coaching job as an administrative assistant at Tulane during the 2000–01 season.

Masiello served on Pitino's staff for six years, gaining a reputation as a top assistant coach and strong recruiter.

[4] It was announced on April 7, 2014, that Masiello will be retained as Manhattan head coach, but is on permanent leave until he gets his undergraduate degree.