Matthews is expected to need six weeks to recover from the procedure which will take him to the start of training camp. The decision to have surgery was made after consultation with specialists and Toronto's medical staff.
The 23-year-old was bothered with a left wrist injury last season but still managed to lead the NHL with 41 goals in 52 games winning the Rocket Richard Trophy. Matthews added a goal and five points in the Leafs' first-round series against the Montreal Canadiens.
During the season, head coach Sheldon Keefe admitted that he had to make adjustments in order to help Matthews play while dealing with the injury.
"We've moved him around on the power play as a result of that," Keefe said. "He's looking not as comfortable when he's shooting, but he's showing he's very good in a lot of other areas. It doesn't seem to affect his ability to handle the puck or pass the puck. ... He's found ways to generate chances and shots, he's made plays for his linemates. He's brought a lot of positive things to us."
The Leafs open the 2021-22 season on Oct. 13 at home against the Montreal Canadiens.