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Turns out it isn't easier to be the quiz master. Seems I missed a couple- Davidson, Hilgendorf and Fairbanks. I didn't include uncapped players eg Adam Freier. Although I didn't know Betham had been in the Reds squad. I also wasn't including overseas franchises- although David Smith and Willie Ripia have have played for 3 (including the Force) if we were going down that line.
The only one you missed was Ali Campbell- Rebels, Brumbies, Waratahs.