Flyers center R.J. Umberger will be sidelined for two weeks with a sprained MCL in his left knee suffered in the Sunday?s loss to the Penguins. ?I feel a little bit better today. I woke up a little stiff, but I did some rehab today and I got a little more movement,? Umberger said on Monday. ?I can do the forward movement, it?s the side-to-side I can?t do right now. It?s kind of a wait and see.?