All four of Roloson's shutouts have come in 11 games since the Lightning obtained the 41-year old from the New York Islanders on New Year's Day. Tampa Bay went up 2-0 just 1:21 into the game on Purcell's first career two-goal game.
Steven Stamkos, getting his NHL-leading 39th goal of the season, and Steve Downie also scored for the Lightning, who have a six-game winning streak. Tampa Bay, which has won all three games against the Flyers this season, trails the conference leaders by two points.
Flyers goalie Sergei Bobrovsky was pulled after giving up three goals on six shots during the first, and was replaced by Brian Boucher. Philadelphia lost for just the third time in the last 13 games.
Purcell scored from the slot at 19 seconds off give-and-go passes with Vincent Lecavalier. Simon Gagne's shot, 1:02 later, went into the net off Purcell's leg.
Purcell has three goals and seven points in his past three games.
Roloson, coming off a 2-0 shutout of Toronto, stopped all 13 shots he faced in the opening 20 minutes. He also made four saves early in the third, including an in-close chance by James Van Riemsdyk.
Downie made it 3-0 from at 14:24 of the first. Stamkos extended the Tampa Bay advantage to 4-0 with 11:09 left in the third.
Notes: Bobrovsky had won his previous six starts. ... Lightning LW Ryan Malone missed his third consecutive game due to a mid-body injury. ... Philadelphia RW Claude Giroux had his career-high seven-game point streak (three goals, 11 points) snapped. ... Tampa Bay D Randy Jones assisted on Downie's goal for his first point in 17 games. ... Tampa Bay, which is currently carrying three goalies, scratched Mike Smith. Dan Ellis served as the backup.