John David Weathers (born September 25, 1969) is an American former Major League Baseball pitcher.

Weathers stayed with Milwaukee until July 30, 2001, when he was traded to the Chicago Cubs, along with Robert Miniel, for Ruben Quevedo and Pete Zoccolillo.

Weathers pitched for the Mets until June 17, 2004, when he and Jeremy Griffiths were traded to the Houston Astros for Richard Hidalgo.

A free agent at the end of the season, Weathers signed with the Cincinnati Reds (returning to the team he played for in early 1998), where he has had an ERA under 4.00 every year that he was with the club.

On August 9, 2009, the Cincinnati Reds traded Weathers to the Milwaukee Brewers for a player to be named later.