Speaking Wednesday on SportsNet New York, Christie declared that "the Phillies suck."
He went on to say that the Phillies were an "awful team" with "an angry, bitter fan base." He also said it's not safe to go to the Phillies' home stadium, Citizens Bank Park, if you want to root for an opposing team.
Philadelphia Mayor Jim Kenney, a Democrat, responded Friday that Christie is "bitter and has got nowhere to go" after his failed presidential campaign. He called him a bully.
Christie also took umbrage with the Phillies' use of the Mets'?"Ya gotta believe!" slogan at their spring training home in Clearwater, Florida.
"Ya gotta believe what? Ya gotta believe we're awful people," Christie told SportsNet New York.
Former Mets reliever Tug McGraw popularized the saying during New York's run to the 1973 World Series. McGraw later pitched for the Phillies.
In a tweet, the Phillies said they appreciate their fans' support.
Their use of the word "bridge" is a dig at Christie over the George Washington Bridge lane-closing scandal that has dogged his administration.
The Phillies attract many fans from southern New Jersey, across the river from Philadelphia.
The Associated Press contributed to this report.