Chad Ashley Harville (born September 16, 1976) is an American former professional relief pitcher.

On August 23, 2005, Harville was claimed by the Boston Red Sox off waivers from the Astros.

With the Red Sox unable to find the right combination of relievers due to injury and ineffectiveness (using a total of 18 pitchers out of the bullpen), they decided to take a chance on Harville, designating Mike Remlinger for assignment.

On November 22, 2005, Harville was signed by the Tampa Bay Devil Rays as a free agent to a one-year deal, but he had another down season, posting a 0-2 record and a 5.93 ERA in 32 appearances.

In 2007, Harville was the closer for the Arizona Diamondbacks Triple-A affiliate, the Tucson Sidewinders.