Johnny Crawford, best known for his role as Mark McCain, the son of Chuck Connors' Civil War vet character on the late '50s, early '60s TV show, "The Rifleman," died on April 29, 2021. He was 75 years old at the time of his death, according to Variety. He was diagnosed with Alzheimer's in 2019, and later struggled with COVID-19 and pneumonia.

Farewell to actor and musician Johnny Crawford at age 75. Crawford was best known for his Emmy-nominated role as young Mark McCain on “The Rifleman.” The father-son relationship between Crawford and Chuck Connors made the Western a television classic. #JohnnyCrawford pic.twitter.com/w3nIOtGRmD I’m saddened to hear of Johnny Crawford’s passing.

Steve Kagan Johnny Crawford, the soulful young actor who became a child star on the western “The Rifleman” in the late 1950s and had some success as a pop singer, died on April 29 in Los Angeles. He was 75. The death, at an assisted-living home, was announced on the website johnnycrawfordlegacy.com by his wife, Charlotte McKenna-Crawford.

Welcome to all the folks who admire Johnny Crawford and appreciate what he accomplished in television, film, and popular music since the 1950s. Sadly, Johnny was diagnosed with Alzheimer’s disease, and he was living in a memory care residence before contracting COVID-19. After recovering, he overcame a bout of pneumonia.