Former NFL running back Chris Johnson has publicly disclosed his diagnosis with amyotrophic lateral sclerosis (ALS), a progressive neurodegenerative disease also known as Lou Gehrig’s disease. Johnson, 40, revealed his condition during a June 29 interview on ABC’s "Good Morning America," where he communicated using a speech-generating device due to the effects of the disease.

Johnson was diagnosed with ALS last year, at age 39. He told co-host Michael Strahan, a Pro Football Hall of Famer, that he has no family history of the disease and that doctors believe his case is sporadic, the form that accounts for the majority of ALS cases. The condition affects nerve cells controlling voluntary muscle movement, leading to muscle weakness and a gradual loss of the ability to move, speak, and breathe. Currently, there is no cure for ALS, but some treatments and clinical trials aim to slow its progression.

Over a 10-season NFL career, Johnson gained recognition as one of the league’s elite running backs. He is one of only nine players in league history to rush for more than 2,000 yards in a single season, achieving 2,006 yards in 2009. That year, he was named NFL Offensive Player of the Year and set a record by rushing for 2,509 yards from scrimmage. Johnson spent six seasons with the Tennessee Titans, rushing for 7,965 yards during that time, and later played for the New York Jets and Arizona Cardinals before last playing in 2017.

Reflecting on his diagnosis, Johnson said he initially felt shock but chose to confront the disease with determination rather than give up. He is currently participating in experimental treatments as part of a clinical trial. Johnson emphasized the emotional challenge of processing the diagnosis but expressed a commitment to fighting the disease.

Amy Adams Strunk, owner of the Tennessee Titans, issued a statement praising Johnson’s contributions both on and off the field, and expressing the organization’s support as he faces his health challenges.

Johnson’s public disclosure has increased awareness around ALS, a disease that, despite being fatal, remains poorly understood by the general public. His willingness to share his story highlights the ongoing efforts by patients and researchers to confront this devastating illness.