For two-and-a-half weeks, the Sharks handled Logan Couture’s absence admirably. Despite losing their second line (and at times top line) center with a hand injury, San Jose won seven of its first nine games without the 24-year-old rising star. They could sure use him now. San Jose has scored just one goal in its last three games, all regulation losses. On back-to-back nights on Wednesday and Thursday, the Sharks lost to the two worst teams in the Western Conference by a combined score of 7-1. “It’s a big concern of ours right now,” head coach Todd McLellan said of his team’s offense. A case can be made the Sharks deserved better against Edmonton, as they fired 59 shots on goal, all of which were turned away by Ben Scrivens in his record-setting performance. In losses to the Kings and Flames, though, San Jose got the result it deserved. The Sharks have 16 goals in their last eight games, including five goals in the last five games, and recently dropped under an average of three goals per game for the first time this season. They were riding the top line of Joe Pavelski, Joe Thornton and Brent Burns for some time, but those none of those players has been particularly good during the three-game losing streak. Lately, that spells certain doom for the Sharks, who were searching for secondary scoring even before Couture got hurt.