The Wallabies have been handed a boost after centre Christian Lealiifano was passed fit to face the Lions at Etihad Stadium on Saturday.
The Brumbies back, who was forced off at Suncorp Stadium only a minute into his Test career, has been given the all-clear to train.
Lealiifano was replaced by the more experienced McCabe in Brisbane but the former vice captain suffered a similar fate two minutes after half-time.
That leads to a blow to Australia as replacement back McCabe, who took a knock to his neck at Suncorp Stadium, is ruled for out this weekend.
Meanwhile, Berrick Barnes is another awaiting assessment on the head injury he picked up towards the end of the first period but the Wallaby management are hopeful that Digby Ioane and Adam Ashley-Cooper will have recovered from shoulder problems to take their places in the starting line up on Saturday.
"They're expecting Christian will be fine and they're hopeful with Digby and Adam that with a bit of rehab, they can be back," said a Wallabies spokesperson.
"(Lealiifano) passed the concussion test on the night, so he was actually keen to come back on, but the time had expired.
"Pat McCabe won't be available this week ... We may know more about the significance of (it), whether he's just irritated it or there's something new there."