Hockey defenceman best known to NHL fans as a member of the St. Louis Blues. He helped the Blues win a Stanley Cup title in 2019. In 2014, he won an Olympic gold medal as a member of the Canadian national team.
He was born in Ontario and got his start with the Richmond Hill Stars in the Ontario Minor Hockey Association.
He was named Best Defenceman at the World Junior Championships in 2010.
His father is David Pietrangelo.
He has been teammates with Ty Rattie in St. Louis.