Defenseman Matt Walker is back with the Flyers, clearing reentry waivers Tuesday and giving the team another option in case Chris Pronger is unable to play in Thursday's playoff opener against Buffalo. "I'm happy he cleared because he's been to the playoffs and has a lot of experience," general manger Paul Holmgren said. Acquired in a salary-cap-related deal that sent Simon Gagne to Tampa Bay in the offseason, Walker has played in 21 career playoff games, including 17 with Chicago in 2008-09. Walker, 31, had surgery on both hips and his knee this season, limiting him to four games with the Flyers and 11 with the AHL's Phantoms. "It's up to the coach," Holmgren said when asked if the Flyers planned to use Walker in the playoffs. "Physically, he's fine, but he hasn't played much and we want to get him up to speed." Nick Boynton and Danny Syvret are also options if Pronger cannot play.