Petro returned to his home in Miami to with his wife, who is scheduled to deliver the child on Sunday. The team is hopeful the 7-footer will return to Atlanta in time for Game 4 of the playoff series against the Pacers on Monday night.
Petro made his first start of the playoffs in Game 3, part of a new, bigger lineup that carried the Hawks to a 90-69 victory. Indiana still leads the best-of-seven series 2-1.
If Petro doesn't return in time for the next game, the Hawks could start Ivan Johnson at center. But coach Larry Drew says he prefers bringing Johnson off the bench.