It seems to be a little early to be dealing with undisclosed injuries, but late in the afternoon on Wednesday, Hockey Canada announced that Duncan Keith wouldn't be able to participate in September's World Cup of Hockey, due to injury and that Jay Bouwmeester would take his spot on the roster.
There was no definitive word on what was ailing the Chicago Blackhawks defenseman, but the release suggested that he was undergoing some kind of rehabilitation and that Hockey Canada wished him luck through it, so we would have to believe it was something. Of course, with no details, we won't know what his availability for training camp will be at this point.
In Bouwmeester, Team Canada will get a veteran of the international scene and a fluid skater, who should be able to help the team move up the ice and be strong on the backcheck, keeping up with some of that speed that will be coming back at the team on the counter attack. He may not have been a popular choice for some, but his veteran presence in this sort of tournament is thought to be very beneficial.