Don't have a proggie around to check but I think it was right. I doubt he will feature in the centres, he openly stated he wanted out of centres and is a better full back to my eyes. I fear he may be a little too slight for a modern centre. He spent his first season at centre and the second at full back.
I believe he played most of his RU - Oxford RL signed him from Oxford University RU where he was a blue - on the right wing, though he has played inside centre and left wing from memory. He played for Nottingham RU last winter but seems not to have done this year. Sean has stated he now considers himself an RL player and it looks like he decided to prepare for the RL season instead.
Last I heard his brothers were on the books at London RU clubs so if it doesn't work out for them more of the family switching codes must be possible.
BTW if anyone has been to Iffley Road, Sean lived in the house in the far corner and quite literally scored a try in front of his living room window a few times.