‘Sabres coach Lindy Ruff said Kalinin was “week-to-week” and would definitely not be back this week. Kalinin is hoping he could return if the playoffs continue past this Eastern Conference semifinal for Buffalo. “I have no idea right now [how long I’ll be out],” said Kalinin, on crutches with a protective boot. “It depends on how it feels. Maybe a week or two weeks, and then we’ll see. It feels terrible to not be on the ice.”‘