When the Flyers play in Buffalo on Saturday afternoon, they will face backup goalie Linus Ullmark (2.71 GAA, .921 save percentage). Starter Carter Hutton (2.60, .917), who had eight victories during the Sabres’ recent 10-game winning streak, is sidelined with an unspecified injury. The Sabres also have three injured defensemen. … Buffalo is 7-0-2 in its last nine home games. … The Flyers will be trying to avenge a 5-2 loss in Buffalo on Nov. 21, a game in which they fell into a 4-0 first-period hole. … Claude Giroux and Sean Couturier lead the Flyers with 10 goals apiece, one more than Wayne Simmonds. … Robert Hagg tops the Flyers with a plus-9 rating. … The Flyers and Sabres are both scuffling. The Flyers have just two wins in their last nine games (2-5-2), and Buffalo has lost four straight (0-2-2) since its 10-game winning streak. … Top-line RW Travis Konecny has 10 points in his last seven games.