Given how much Houston slimmed down after he got here, my suspicion is they considered him not fit enough for Super Rugby, but that was a Catch 22 because he's not that type of mobile player, he's a classic hard hitting 8. He was a beast in the UK where the game was slower and he could throw his weight around against slightly lesser opposition, but Super Rugby is a different game. I hope he goes back to the UK, puts on a few kgs and resumes his former cult hero status by bashing people.
On top of injury, he also seems to have been a victim of this strange Reds obsession with back rowers. Too many back rowers are never enough, but who needs a spare fly half?
On the plus side for him, he did get his Wallaby cap. Only one, and off the bench, but he's a Wallaby for life now. Good on him.