Playing without Pavel Datsyuk, Johan Franzen and Henrik Zetterberg, Detroit could not muster much offense against Philadelphia, which got two goals from Scott Hartnell and a three-point night from Claude Giroux in a 5-0 victory.
"I thought he played well," Flyers coach Craig Berube said of Mason, who had been pulled in two of his prior three starts. "[Detroit] attacks as good as any team in the League, and they put a lot of pucks on the net. I thought he was good."
Detroit has been shut out in three straight road games for the first time since 1928 and the second time in franchise history.
The Flyers (26-22-6) moved into third place in the Metropolitan Division. They are one point in front of the Carolina Hurricanes, who lost 3-0 to the Montreal Canadiens, and two points ahead of the Columbus Blue Jackets, who lost 3-2 to the Ottawa Senators.
Hartnell opened the scoring at 13:42 of the first period with Detroit defenseman Danny DeKeyser off for cross-checking. Hartnell deflected a point shot by defenseman Kimmo Timonen past Red Wings goalie Jonas Gustavsson.
Hartnell scored at even strength to put the Flyers up 2-0 at 8:08 of the second period when he fired a wrist shot past Gustavsson for his 14th goal of the season, third in four games. Detroit defenseman Niklas Kronwall got caught pinching in the Philadelphia end, allowing Hartnell to get free with Giroux and Jakub Voracek on a 3-on-2. Giroux slid a cross-ice pass to Hartnell, who took a quick shot to beat Gustavsson to his glove side.
Hall extended the Flyers' lead to 3-0 a little less than three minutes later. The fourth-line right wing backhanded a rebound past Gustavsson for his third goal of the season after the Detroit goalie made the initial stop on defenseman Erik Gustafsson's shot from the left point.
"Obviously, we're disappointed," Kronwall said. "I thought in the first we did a lot of good things. … I thought we were fine after the first. In the second period, we were fine until I made a big mistake there, and it cost us that second goal."
Detroit (23-19-11) had its chances to make the game close.
Mason robbed Red Wings rookie Luke Glendening with a left-pad save on a 2-on-1 at 12:31 of the second period to preserve the 3-0 lead, and Kyle Quincey fired the rebound off the crossbar, one of three Red Wings' attempts to hit the post.
Mason credited his teammates' improved play for the shutout.
"A lot of playing comfortable is the way the guys play in front of me, and tonight was a better effort than we've had," he said. "There's still some things that we need to work on, but it was a cleaner game than we've played recently."
Philadelphia shut down two Detroit power plays in the first half of the third period. The Red Wings were 0-for-4 with the man-advantage.
"I thought we had some self-inflicted wounds. We hadn't been turning over pucks. … We've got to regroup, and we've got to play better than this," Detroit coach Mike Babcock said.
Shortly after the Flyers killed off a minor penalty against Brayden Schenn without allowing a shot on goal, Giroux scored his 16th to give the Flyers a 4-0 lead at 11:22 of the third. Gustavsson, who stopped 23 of 28 shots, got his glove on Giroux's wrist shot from the left circle, but the puck rolled into the net.
Giroux, who assisted on each of Hartnell's goals, has 44 points in the past 41 games. Hartnell and Voracek were credited with assists on Giroux's goal.
Hartnell's first goal marked the first time in seven games that the Flyers opened the scoring in the first period; they scored first in a 4-3 shootout loss to the New York Islanders last Monday, but not until the second period.
"It's been a while that we got the first goal of the game. We kind of got momentum out of it, and we kept it the whole game," Giroux said. "I think we did a better job of getting out of our zone, and that's when we got more chances offensively."
Couturier completed the scoring with a wraparound goal, his ninth, with 3:51 remaining.
Franzen, who returned to play Sunday against the Florida Panthers after a concussion forced him to miss 16 games, was placed on injured reserve Tuesday due to a recurrence of symptoms. Datsyuk has played in 35 of 58 games, none since Jan. 1, because of a groin injury. Zetterberg has missed two straight games with a sore back.
Mark Streit had two assists for Philadelphia. Acquired in an offseason trade from the Islanders, he is fourth on the team and first among defensemen with 20 assists.
Timonen left the game with a lower-body injury with 8:46 remaining in the second period and did not return. He was wearing a walking boot on his left foot after the game, but Berube said the injury is not believed to be serious.
The Flyers will play their next three games in California, beginning Thursday at the Anaheim Ducks. Detroit returns home for the opener of a home-and-home set against the Washington Capitals on Friday.
Material from team media was used in this report.