The Maple Leafs (13-13-5) suffered their seventh straight loss Saturday - with only one point over that span - allowing five power-play goals in a whopping 14 opportunities en route to a 5-1 defeat to the Detroit Red Wings.
"On the penalty kill, we didn't get the job done," Maple Leafs coach Paul Maurice said. "In the end, their power play was too good."
Toronto has been outscored 29-9 during its slide, while converting only 4 of 37 of its own power-play chances (10.8 percent). The Leafs have not won since Nov. 24, a 7-1 victory at Washington.
Toronto has not dropped eight in a row since an eight-game skid from Feb. 16-March 3, 1996. The Leafs also hope to avoid getting closer to their franchise record 10-game losing streak - set from Jan. 15-Feb. 8, 1967.
Bryan McCabe, who scored Toronto's lone goal against Detroit, is tied for second on the team with Tomas Kaberle with 25 points, one behind leader Darcy Tucker, who has only managed one point in his last six games.
The Leafs have dropped three in a row at home for the second time this season. They have dominated Tampa Bay there, however, winning seven of the last eight meetings between the teams at the Air Canada Centre.
Toronto won 4-2 at Tampa Bay (14-14-2) on Nov. 1.
The Lightning are also struggling, with five losses in their last six games including a 4-3 defeat to Anaheim on Saturday.
Marc Denis allowed the game-winning goal on a Chris Kunitz shot from behind the net, which deflected off the goaltender's skate at 2:26 of the third period.
"I feel terrible," Denis said. "It ended up as a game-winner. It just can't happen, not at that time of the game."
The loss came after an 8-0 rout of Atlanta on Thursday, when Denis made 21 saves for his first shutout since Dec. 28, 2005. It was Denis' lone victory in his last nine starts, during which time he's posted a 3.65 goals-against average.
Vincent Lecavalier, who had his five-game goal-scoring streak end Saturday, is looking to extend his points streak to seven games. He also has 12 points in an eight-game streak against Toronto.
Lecavalier's linemate Martin St. Louis appears to have regained his pre-lockout form from 2003-04, when he finished as the league's top scorer and MVP with 94 points, helping the Lightning to their only Stanley Cup title.
The right wing has 39 points through 30 games after recording only 61 over a full season in 2005-06.