Vlasic left Tuesday's win over the Oilers after he was knocked into the boards late in the first period, Kevin Kurz of CSN Bay Area reports. Coach Todd McLellan didn't specify the nature of Vlasic's injury in his postgame interview, but he indicated that the defenseman's removal had more to do with "precautionary-type stuff." The Sharks are expected to offer more information regarding his injury during Wednesday's practice, but he'll be considered questionable for Thursday's tilt with the Wild for the moment. The blueliner has eight points and a plus-12 rating over 30 games on the campaign.