Former NFL running back Chris Johnson says he was diagnosed with amyotrophic lateral sclerosis (ALS) last year at age 39. Multiple outlets report that Johnson publicly disclosed the diagnosis, describing it as a shock and saying he plans to continue fighting the disease. One account notes that the condition has shown a rapid progression, while another highlights his decision to respond with determination. The reports describe ALS as an incurable neurological illness and present Johnson’s remarks as both a personal update and an expression of resolve. No sources in the provided materials offer details about how the diagnosis was made, when symptoms began, or specific treatment steps. The outlets also do not conflict on the central points: Johnson is the former NFL player, he was diagnosed last year, he was 39 at the time of diagnosis, and he is openly addressing the news now. The disclosure comes after his NFL career, which included playing for the Tennessee Titans, as referenced in coverage.