I may have missed it somewhere on the forum, but has any indication been given as to the seriousness of his injury? How much of the season is he likely to miss?

I don't think it has been mentioned. The news appeared in the Guardian under a feature about Ratchford's injury. But Patton and Dwyer both had wrist surgery at the end of the season, so that's 4 months to get back for the start of 2017.

How two young lads could both get wrist injuries is a complete mystery to me ?

Both players were asked to describe what Lebron James and KingRoss11 were without using their voices , only hand signals!!

I believe Dec Patton's was an old injury which needed to be reset.