http://www.nhl.com/ice/news.htm?id=547142
According to NHL.com, Datsyuk was injured when he feel awkwardly into Vancouver's net.
He has missed only three regular season games in the past 3 years.
While I've never had a problem with him, do to him being an excellent player, it is nice to see other teams' having to deal with some of the same problems the Blues have faced this year.