Michael Johnson, son of "Inside the NBA" host Ernie Johnson, died Friday. He was 33.
Ernie confirmed the news on social media, saying the family was "grieving" but grateful to have 33 years with Michael.
Johnson explained in his Instagram post that Michael, who was adopted from Romania, was diagnosed with duchenne muscular dystrophy, a genetic disorder in which muscles degenerate over time.
The Muscular Dystrophy Association shared Michael's story in a 2015 video.
It's unclear if Johnson will take time away from his broadcasting duties following Michael's death.