Buffalo Sabres forward Kyle Okposo is out week to week with a rib injury sustained in a 6-3 win against the Arizona Coyotes on Thursday, coach Dan Bylsma said Saturday. "I hope that can be re-evaluated and we can get a better result after 7-10 days," Bylsma said. "It's a big loss. Obviously a top line guy and on our power play, our leading point-getter; it's a big loss and one we experienced in the game." With Okposo out, forward Nicolas Deslauriers, a healthy scratch the past four games, will play for the first time since Feb. 19. "He needs to be a physical presence, needs to be a factor in the game with his body," Bylsma said, "and with the line right now with Zemgus [Girgensons] and Justin Bailey, we need all four lines to play in this game tonight." The Sabres, 1-3-1 in their past five games, are six points out of the second wild card into the playoffs from the Eastern Conference and have a chance to pass the Lightning, who they trail by one point. "Obviously it means a lot," center Ryan O'Reilly said. "These guys are right in front of us and a team that's in the way right now. … These are the real important ones." Goaltender Robin Lehner will start.