Oliver Miller was known as the "The Big O" for his 6-foot-9, 280-pound frame that ballooned to well over 300 pounds during his NBA career.

Oliver Miller is recognized during a timeout of a game between Arkansas and Texas A&M on Wednesday, Feb. 22, 2017, in Fayetteville. Miller, who was one of the most impactful players in Razorback basketball history, died Wednesday at the age of 54. (Jason Ivester/NWA Democrat-Gazette)

Oliver J. Miller, a former star athlete at Southwest High School and later a standout at Arkansas and in the NBA, has died. He was 54. Nicknamed “The Big O” because of his 6-foot-9, 300-plus pound body frame, Miller died on Wednesday, March 12, according to longtime Phoenix Suns television analyst Eddie Johnson.