Back row injuries (Vialanu, Shields, T Willis, Oghre ) and international call ups (J Willis, Lauch, Rowlands) have also meant he has probably had too play more than ideal as well.
I have included second row call ups as the likes of gaskell and cardall might have been able to provide back row cover too, similar to Oghre as an injury who could cover back row.
Also as previously mentioned he is not long out of age grade rugby where there are seasonal restrictions into full time professional training/ playing.