Rivalries in sports can increase pressure on coaches and players, but they might be felt strongest by fans.
In this edition of Reading Baseball, Pete Peterson - a Pittsburgh native - tells us why he hates the City of Brotherly Love's sports teams.
Reading Baseball is a series of essays and commentaries by Richard "Pete Peterson, co-author, with his son, Stephen, of The Slide: Leyland, Bonds and the Star-Crossed Pittsburgh Pirates and the editor of The St. Louis Baseball Reader.