O'Neal and the Suns' horrible season mercifully ends Wednesday in Denver.
O'Neal scored six points in Tuesday's 101-98 loss to the Rockets.
The Phoenix Suns center had been dealing with a sore calf.
O'Neal was sidelined indefinitely with an irregular heartbeat.
It is uncertain how much more time he will miss.
The 33-year-old center has career averages of 13.7 points and 7.4 rebounds. O'Neal was drafted 17th overall directly out of high school. Later, with the Indiana Pacers, he played in six consecutive All-Star games. He also played for Toronto, Miami and Boston.
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