Cleveland Browns radio play-by-play voice Jim Donovan announced on Wednesday he has suffered a relapse with leukemia and has resumed treatment on Channel 3 News’ “Front Row.”

Donovan stated on the show that concerns started to showcase themselves about a year-and-a-half ago. Since the diagnosis, he has been receiving various forms of chemotherapy.

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“This is going to be kind of a long and winding road through this treatment plan, because it is going to be aggressive,” Donovan said on the show. “The goal is: gotta get better, gotta get healthy, gotta move on. I know the deal, I’ve done it before, and I plan to do it once again. Through all of this, I will be here at Channel 3 and on the radio as much as I can be. But there will be periods of time that I might not be with you, maybe for a day, maybe for longer.”

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In 2000, Donovan received his initial chronic lymphocytic leukemia (CLL) diagnosis. In the summer of 2011, he eventually received a bone marrow transplant.

Donovan resumed his radio duties on the Browns Radio Network three months after the operation. He said he will continue in his position with the Browns for as long as he is able to do so during Wednesday’s announcement.

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“Our thoughts and the thoughts of the entire organization are with Jim and his family right now in this difficult time,” Browns owners Dee and Jimmy Haslam said in a statement on the team’s website. “There is no better representative of the Cleveland Browns. He is as tough as they come and proved as much in his previous battle. We’re all behind Jim and will do everything we can to support him. We look forward to him winning this fight, being around the team and continuing to call our games during the season.”