In his later years Watts taught physical education in the Seattle School District and ran a basketball academy with his son. He was named to the Sonics' 40th anniversary team.

Donald "Slick" Watts died on Saturday, March 15. The Seattle Supersonics fixture was 73. Here's what we know about his cause of death.

Former Seattle Supersonics guard Donald "Slick" Watts has died at 73, his son announced on social media. Watts, an undrafted free agent in 1973, emerged as a fan favorite in the Pacific Northwest due to his stellar play, signature crooked headbands and frequent presence around the Seattle sports scene.