Rasmus Ristolainen (born 27 October 1994) is a Finnish professional ice hockey player who is a defenceman for the Philadelphia Flyers of the National Hockey League (NHL). He was selected eighth overall by the Buffalo Sabres in the 2013 NHL entry draft.
Ristolainen made his NHL debut with the Buffalo Sabres on the opening night of the 2013âÂÂ14 season, on 2 October 2013, against the Detroit Red Wings. He scored his first career NHL goal on 25 October, in a 3âÂÂ1 win over the Florida Panthers. He scored his first NHL hat-trick on 10 December 2015, in a 4âÂÂ3 loss against the Calgary Flames. In doing so, he became the first Sabres' defenceman to score a hat-trick since Hockey Hall of Famer Phil Housley did so in the 1987âÂÂ88 season.
On 21 March 2017, Ristolainen delivered a check to Pittsburgh Penguins forward Jake Guentzel. Guentzel suffered a concussion on the play, and Ristolainen was given a three-game suspension for interference by the league.
On 23 July 2021, Ristolainen was traded by the Sabres to the Philadelphia Flyers in exchange for Robert Hägg, a 2021 first-round pick and a 2023 second-round pick. On 10 March 2022, he signed a five-year contract extension with the Flyers.
On 5 January 2014, Ristolainen scored the overtime winner in the final of the 2014 World Junior Ice Hockey Championships against previously undefeated Sweden, giving Finland the gold medal.
Ristolainen represented Finland at the 2026 Winter Olympics and won a bronze medal.