‘Ristolainen, the 26-year-old defenseman who was indifferent about spending the final year of his contract in Buffalo, was traded to the Philadelphia Flyers on Friday in exchange for defenseman Robert Hagg, a first-round pick in this year’s draft, No. 14 overall, and a second-round selection in 2023. The Sabres protected Ristolainen for the Seattle expansion draft in anticipation of a deal that would bring assets to Buffalo, a move that led the Kraken to select defenseman Will Borgen.’