Erik Källgren Article in HockeysverigeRead the sourceArticle in HockeysverigeRead the sourceArticle in SVT SportRead the source, replacing the injured Viktor Fasth and becoming one of the team's key players. Article in Växjö LakersRead the source grew up in Stockholm and began playing hockey with Lidingö Vikings. In Article in Linköping HCRead the source, he was admitted from Nacka to Linköping’s hockey upper-secondary school, which combines academic studies with hockey training.
In an April Article in Linköping HCRead the source club interview, Källgren recalled joining Linköping when he began hockey upper-secondary school. Article in Linköping HCRead the sourceArticle in Linköping HCRead the source.
When he left AIK in March 2019, Källgren credited goalie coach Article in AIK HockeyRead the source as an important reason for his development there. Later that year, he returned from Article in Växjö LakersRead the source earlier than planned, and Växjö took the opportunity to sign him.
Article in HockeyNewsRead the source: in December 2022, HockeyNews reported that Källgren had a portrait of Börje Salming on his goalie mask.