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John Mellencamp Says Daughter Teddi Is ‘Really Sick,’ Urges Her to Move to Indiana During Cancer Care

He outlined grueling post‑immunotherapy side effects and a years‑long path to remission after earlier scans showed no detectable cancer.

Overview

  • Teddi Mellencamp’s father said on The Joe Rogan Experience that she is suffering and has cancer in the brain.
  • On NBC’s Today, he said he is trying to convince her to leave Los Angeles for Indiana with her children for support, though she has declined so far.
  • He described a treatment cycle in which she feels well until immunotherapy, then feels very ill for about four days before recovering.
  • Teddi reported in October 2025 that scans showed no detectable cancer, but she remained on immunotherapy and was not considered in remission.
  • Her melanoma was first diagnosed in 2022 and progressed to stage 4 in 2025 with metastases to the brain and lungs, leading to surgeries, radiation and ongoing immunotherapy.