The Cardinals announced on Thursday that Hall of Famer Lou Brock has had to cancel his April 25 Budweiser Bash appearance at Busch Stadium as he is currently undergoing treatment for multiple myeloma.

Brock, 77, was recently diagnosed with the cancer and has been undergoing treatment in St. Louis.

"I am disappointed that I won't be able to make the event," Brock said in a press release distributed by the Cardinals. "Jackie and I appreciate the prayers and support we have received from our many friends and fans in the Cardinals community. We count ourselves blessed that I am receiving the best possible medical treatment and we look forward to seeing many more Cardinals World Series Championships in the future."