Chris Johnson reveals ALS diagnosis at 39 and how he now communicates using speech technology

Former NFL running back Chris Johnson has revealed he was diagnosed with ALS last year, sharing the emotional news in a recent interview while also opening up about how dramatically the disease has changed his daily life.

Johnson, 39, said the condition has progressed rapidly and now affects his ability to speak, requiring him to use a speech-generating device to communicate.

The former All-Pro running back, best known for his explosive speed during his NFL career, described the diagnosis as life-altering, marking a stark shift from his years as one of the league’s most dynamic offensive playmakers.

What is ALS?

Amyotrophic lateral sclerosis (ALS), often known as Lou Gehrig’s disease, is a progressive neurological condition that affects nerve cells in the brain and spinal cord.

Over time, ALS leads to the loss of muscle control, impacting movement, speech, eating and eventually breathing. There is currently no cure, and the disease progresses at different rates depending on the individual.

According to medical experts, many patients gradually lose the ability to speak, which is why assistive communication technology has become a critical tool for maintaining quality of life.

How Chris Johnson is communicating now

Johnson revealed that his condition has advanced to the point where speaking naturally is no longer possible in most situations. To continue communicating, he now relies on a speech-generating device, a form of assistive technology that converts typed text or selected words into synthetic speech.

These devices typically work through:

• On-screen text input or predictive word selection
• Eye-tracking or touch-based navigation systems
• Pre-programmed phrases for faster communication
• AI-generated synthetic voice output

The technology allows individuals with ALS to maintain communication even as physical speech abilities decline.

Life after football

Johnson’s revelation adds to a growing number of former athletes who have spoken publicly about neurodegenerative conditions linked to life after professional sports. While Johnson did not connect his diagnosis to his playing career in his interview, ALS has become a widely discussed condition in the sports world due to its impact on former football players.

The speed of his progression, from diagnosis to requiring assistive speech, shows just how unpredictable the disease can be.

During his NFL career, Johnson was known for his elite speed and game-breaking ability, most notably during his time with the Tennessee Titans, where he became one of the league’s most productive running backs.

Since retiring, he has remained connected to football while also exploring business ventures and media appearances. Now, his focus has shifted toward managing his health and adapting to life with ALS.

Raising awareness

Johnson’s decision to speak publicly about his diagnosis is expected to raise awareness of ALS and the challenges faced by those living with the disease. Advocates say visibility from high-profile athletes can help increase understanding of both the condition itself and the importance of assistive communication technology in maintaining independence.

While his journey has changed dramatically, Johnson’s message is that communication, in any form, still matters.

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