Heartbreaking loss for the NBA ... former center Oliver Miller -- famously known as "The Big O" -- has passed away at the age of 54.
Former NBA player Eddie Johnson broke the news on Wednesday ... expressing his sadness as he announced Miller's passing.
"We have lost another @NBA Fraternity member!" Johnson said. "Going to miss you Big O. ud83dude4fud83cudffeud83dude4fud83cudffeud83dude4fud83cudffeud83dude4fud83cudffe. RIP."
Miller was a standout athlete at Southwest High School in Fort Worth, Texas before committing to the University of Arkansas to play for the Razorbacks.