Jermaine O'Neal has announced he's called off his plans for a comeback to the NBA.

The Dallas Mavericks had been optimistic of their chances of signing O'Neal after the All-Star break.

O'Neal wrote that "the time isn't right for me to play now."

O'Neal informed the Mavericks that he wasn't able to get physically ready to play in the NBA.

"I don't feel like I'm at that position now with just seven weeks of training, and I'm not comfortable making that commitment at this point," O'Neal wrote in a separate Instagram post. "The issue for me is timing and things feeling right. I'm a true believer of signs and listening and understanding life."