1
Keiran's always been a bit of an oddity, it seems to me. He plays better with the more games he has, and if injured or out of the line-up he gets out of shape (possibly if he's not playing he lacks the motivation to stay in peak fitness - something common in top sportsmen).
Certainly when he came back from the UK he was big, but his scrumaging (hardly a weakness of his before he left) was massively improved, so I forgave him any belly. If he can keep the weight off and stay a scrum monster, then all to the better, as he's a better ball-carrier when lighter.