SAN JOSE — Sharks forward James Sheppard is expected to be on the sidelines for the start of training camp this week after undergoing an offseason procedure on his already rebuilt left knee.

Details of the latest surgery or how the injury occurred were not available. A team spokesman said the Sharks would have a better idea how long Sheppard could be out of action after the Thursday physical exam that marks the start of camp for the 2014-15 season.

Sheppard, 26, signed a one-year, $1.3 million contract this summer after finishing last season with four goals and 16 assists in 60 games. He struggled early, but found success late in the year as a third-line center and chipped in two goals and four assists in the postseason.

Selected in the first round of the 2006 draft by the Minnesota Wild, Sheppard came to the Sharks in August 2011 in exchange for a third-round draft pick. He had sat out the previous season after injuring his knee in an all-terrain vehicle accident, and needed another year and a second surgical repair to recover.