Joseph Paul Pettini (born January 26, 1955) is an American former Major League Baseball player and the former bench coach for the St. Louis Cardinals and Houston Astros.

Pettini attended Brooke High School in Wellsburg, West Virginia and Mercer University in Macon, Georgia.

In 1984, Pettini would sign with the minor-league Louisville Redbirds, then an affiliate of the St. Louis Cardinals, beginning his long association with the organization.

In 2002, St. Louis Cardinals manager Tony La Russa picked Pettini to be his bench coach.

Pettini checked infield positioning during gameplay, and kept a stopwatch to measure the pitchers' release time to the plate.