Drafted in the 7th round in the 2013 NHL Entry Draft, Johnsson has had to work his way up through the Leafs’ system. He spent his first two seasons with the Marlies of the AHL, and became one of their top offensive threats. Johnsson got his feet wet in 2017, playing in nine games with the Leafs. He finally made the team in 2018 out of training camp, and has become a solid role player ever since. Johnsson had 43 points in 73 games last season.