Indeed, agree. But he's also a player with 100% performance everytime! This is what I meant.
First I would check training sessions, time to refresh, did they gain condition normally or are they pushed by packs, what about moral issues, how often do they play. No knowing the game engine but it could be always possible that a player is not lucky of a substitution in 1st half except of injury.
Think about how your handle your team.