The US import was initially cleared of any structural damage following after a collision with United’s David Barlow midway through the fourth quarter of the Sixers’ victory on Sunday.
With the series one-all, he was expected to only miss Friday night’s match in Melbourne.
However he has been ruled out for the series after a CT scan revealed an unusual pattern scapula fracture.
He won’t require surgery.
It’s a huge blow, with the 34-year-old forward Adelaide’s second most important player behind MVP Mitch Creek.
Childress arrived in Australia in October as injury-replacement for Alan Wiggins and has proved a match-winner, steering Adelaide into the grand final with his semi-final heroics against Perth.
Meanwhile, 36ers coach Joey Wright has been fined $5000 after comments he made after game one of playoffs against the Wildcats.
The NBL issued a statement today, saying comments Wright made about the league in the post-game media conference were “inappropriate and warranted a sanction”.
Adelaide have accepted the penalty.
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