OKLAHOMA CITY — Dan Ellis made 20 saves to help the Dallas Stars beat the Edmonton Oilers 4-0 on Friday night in a preseason game.Brett Ritchie had two third-period goals for the Stars at Cox Convention Center, including an empty-netter.Austin Smith beat Devan Dubnyk to make it 1-0 at 11:07 in the first, and Luke Gazdic converted a 3-on-1 rush in the second.Panthers’ sale finalVincent Viola has been introduced as the new principal owner, chairman and governor of the Florida Panthers. Viola paid $250 million for the team and the operating rights to the BB&T Center, the team’s home arena. Viola also gets the development partnership with Boyd Gaming, an effort to put a casino adjacent to that arena. Viola says he is honored to take over, and has a goal of “bringing a Stanley Cup to our incredible fans here in South Florida.” Tim Thomas backTim Thomas is officially back in the NHL. The Stanley Cup-winning goalie signed a one-year contract Thursday with the Panthers. Financial terms were not released.