Hirvonen was chosen as the 59th overall pick in 2020, and he was hoping to earn a spot on the Leafs team during this year's training camp. He performed exceptionally well in the Liiga, scoring 28 points in 57 games for HIFK.
Despite his injury, Hirvonen managed to walk off the ice after practice, but it was evident that he was in pain. Later, it was revealed that he had suffered a concussion.
Since today marks the last day of the training camp, it is highly unlikely that the Leafs will offer Dillingham a contract. This is especially true because he caused such a serious injury to one of their most promising young players.