The Buffalo Sabres are trading defenceman Rasmus Ristolainen to the Philadelphia Flyers in exchange for defenceman Robert Hagg plus more, reports Anthony SanFilippo of

Ristolainen, 26, had four goals and 18 points in 64 games with the Sabres last season. 

Ristolainen was drafted in the first round (8th overall) in 2013 NHL by the Sabres.