Ruutu and Team Finland began preliminary round play against the U.S. on Friday morning. Stefan Matteau, who was named to the U.S. roster, will miss the tournament after suffering an injury in Team USA’s exhibition meeting with Austria on Tuesday.
Josefson and Sweden were set to face former Devil Jaromir Jagr and the host Czechs on Friday afternoon.
Devils prospect Artur Gavrus has been added to Team Belarus, which begins play Saturday against Slovenia.
Ruutu’s making his fifth appearance at the world championships, and first since winning gold with the Finns in 2011, when he posted six goals in nine games.