What happened: Chris Johnson has revealed that he has been diagnosed with ALS, sharing the news in a televised interview. In his own words, the disease has changed what his body can do but has not changed who he is.

Why it matters: ALS is a progressive neurological disease with no known cure, and the diagnosis of a widely admired former running back known for his breakaway speed has resonated far beyond his old locker room. The disclosure has drawn an outpouring of admiration and support across the NFL community.

What to watch: Former teammates, fans, and figures around the league are rallying behind Johnson, and further updates on his condition and any awareness efforts he champions will follow.