TORONTO — The Toronto Maple Leafs say defenceman Travis Dermott will undergo shoulder surgery on Friday and is expected to be out of action a minimum of six months.

The prognosis means Dermott will miss training camp and the beginning of the 2019-20 season and won't be available until the second week of November at the earliest.

The 22-year-old Dermott had four goals and 13 assists in 64 games for the Maple Leafs this season. He added a goal and two assists in seven playoff games in Toronto's first-round defeat to Boston.

In 101 career NHL games, the Newmarket, Ont., native has registered 30 career points (five goals, 25 assists). He has added two goals and two assists in 14 career playoff games.

Dermott originally injured his shoulder during Toronto's 6-2 win over Edmonton on Feb. 27 when he was checked into the boards by Oilers forward Brad Malone. He missed 14 contests, then returned for Toronto's last five regular-season games and its playoff series with the Bruins.

Dermott was originally selected by the Maple Leafs in the second round (34th overall) of the 2015 NHL draft.

Since the Leafs were eliminated from the Boston Bruins last month, Zach Hyman had ACL surgery (six months recovery), Auston Matthews underwent minor surgery and John Tavares suffered an oblique injury that will cause him to miss the upcoming world hockey championship.