Avalanche's Guenin to miss at least a week with possible concussion

Colorado Avalanche defenseman Nate Guenin will be out at least a week after suffering a possible concussion against the Toronto Maple Leafs.

Guenin was injured in the second period and did not come out for the start of the third in Monday's game.

Patrick Roy also noted that goaltender Reto Berra suffered an ankle injury during warmup and will have an MRI on Tuesday.