The Sharks lost their all-time leading scorer, Patrick Marleau, 37, who signed with the Toronto Maple Leafs as an unrestricted free agent July 2, and will need others to step up.
That task falls to a group of young forwards, including Tomas Hertl, 23, who had an NHL career-low 22 points (10 goals, 12 assists) in 49 games last season; Joonas Donskoi, 25, who had 17 points (six goals, 11 assists) in 61 games; Chris Tierney, 23, who had 23 points (11 goals, 12 assists) in 80 games; and Timo Meier, 20, the No. 9 pick in the 2015 NHL Draft, who had three goals and three assists in 34 games.
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Forward Melker Karlsson, 27, also will be expected to pick up some of the slack. He had 22 points (11 goals, 11 assists) in 67 games last season, his third in the NHL.
Secondary scoring helped the Sharks reach the 2016 Stanley Cup Final for the first time in their history before losing to the Pittsburgh Penguins in six games. But that wasn't the case last season during their six-game loss to the Edmonton Oilers in the Western Conference First Round, when Hertl, Tierney and Donskoi were held without a goal, and Karlsson and forward Joel Ward each had one.The drought came at a time when Thornton and center Logan Couture each was playing through an injury.
Thornton had a torn ACL and MCL in his left knee, and missed the final three regular-season games and first two playoff games. The 38-year-old signed a one-year contract worth $8 million, according to his agents, to remain in San Jose on July 2. He had 50 points (seven goals, 43 assists) last season and no goals and two assists in the playoffs.
Couture, who had 52 points (25 goals, 27 assists) in 73 games last season, was hit in the mouth by a deflected shot against the Nashville Predators on March 25. He missed the final seven regular-season games but returned for the playoffs.