Ristolainen akaita NHL yake yokutanga pamwe Buffalo Sabres pamusoro yokutanga usiku 2013-14 mwaka, musi 2 October 2013, pamusoro Detroit Red Wings. Akawana chinangwa chake chekutanga cheNHL mumwedzi iwoyo, musi wa25 Gumiguru achipesana naJacob Markström weFlorida Panthers. Musi wa 5 Ndira 2014, Ristolainen akarova mukwikwidzi wenguva yakawedzerwa mumutambo wekupedzisira we2014 World Junior Ice Hockey Championships
vachirwa neSweden yakanga isati yarohwa, vachipa Finland menduru yegoridhe. Akawana rake rekutanga NHL hat-trick musi wa 10 Zvita 2015 vachipesana neCalgary Flames. Mukuita kudaro, akava mudziviriri wekutanga weSabres kuti awane hat-trick kubvira Hockey Hall of Famer Phil Housley akaita saizvozvo mumwaka wa1987-88.