Glenn Patrick Sherlock (born September 26, 1960) is an American professional baseball coach.

A catcher, he played in the Astros and New York Yankees farm system until he retired in 1988, without having made it to the Majors.

He was employed for ten seasons in the Yankee chain either as a minor league player, coach or manager.

Brought to the Diamondbacks in 1996 as a minor league instructor by Buck Showalter, the team's first manager and also a veteran of the Yankee farm system, Sherlock worked for eight different managers in his 19 seasons on the Diamondbacks' MLB staff.

On November 15, 2016, it was announced that Sherlock would replace Tim Teufel as the Mets' new third base coach and a catching instructor.