Matt Miller is on the latest edition of The Life of Fitz podcast, and I'd strongly recommend everyone listen, it's very good. Matt also has stage 4 prostate cancer, but it's apparently much worse than Fitz's. They talk about that, his time at K-State, and his coaching career. There is also a super awkward moment when Fitz asks him about alcoholism. When Fitz is asking the question you feel like they definitely talked about it before, but when Matt answers it's apparent that they definitely didn't discuss it before the podcast.
Anyway just search life of fitz podcast like anywhere.