It was after regular goalkeeper Petr Mrazek let in four pucks on 12 shots that Källgren got the chance in the Toronto cage for the first time, halfway into the second period.
The 25-year-old then conceded just one goal and saved ten shots.
- Erik was great, he was calm, cool, collected.
He made some great saves and looked confident to be a guy coming in for the first time, without warning, under these conditions.
I think he looked fantastic, says Keefe according to nhl.com.
Despite Källgren's efforts, the match ended in a loss for Toronto, with 4-5.
Källgren has mainly played in Toronto's AHL team during the 2021/2022 season.
The season before that, he played in SHL's Växjö Lakers.