The fight, which was due to take place in Atlantic City on October 29, will be put back to a later date after Ward suffered a cut during a sparring session.
The 27-year-old wrote on Twitter: "Bad News: I sustained a cut in sparring a few hours ago...flew to LA to see the Doc. I got 7 stitches. I will let you know the new date soon.”
British boxer Froch, who has 28 wins under his belt, will have to wait for a new date to be announced.