Former Titans RB Chris Johnson Diagnosed With ALS at 40

Former NFL star Chris Johnson says he's been diagnosed with ALS

Chris Johnson, the former Tennessee Titans running back, has announced that he has been diagnosed with ALS (amyotrophic lateral sclerosis) at age 40. Johnson, who was known for his exceptional speed and athleticism during his NFL career, disclosed his diagnosis publicly. ALS is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord.