Ales Kotalik scored 1:03 into overtime to cap a three-goal rally that lifted the Sabres over the Maple Leafs.
Derek Roy and Paul Gaustad scored power-play goals in the final 2:21 of regulation to force overtime, and Max Afinogenov picked up three assists. Ryan Miller stopped 26 shots for the Sabres.
Kotalik scored the winner when he chased down a loose puck in the left corner. Holding onto the puck, he worked his way back to the point and blasted a shot that cleanly beat rookie goalie Justin Pogge in a game that was scoreless after 40 minutes.
Defensemen Ian Whote and Pavel Kubina each scored power-play goals for Toronto.
Pogge had a solid game despite the loss. Toronto's 2004 third-round draft pick finished with 28 saves, and stopped the first 25 shots he faced - including 15 in the first period.
Senators 3, Canadiens 1
Daniel Alfredsson scored the game-winning goal in Ottawa's victory over Montreal.
Nick Foligno and Chris Neil also scored for the Senators who saw goalie Martin Gerber make 18 saves in the won.
Kyle Chipchura gave the Canadiens a fast lead, scoring 35 seconds into the game.
The Senators (3-2-0) leave Sunday night for Sweden, where they will finish training camp before opening the NHL season Oct. 4-5 with two games against the Pittsburgh Penguins in Stockholm at Bridgestone NHL Premiere 2008.
The Senators announced during the game that 39-year-old defenseman Luke Richardson signed a one-year, two-way contract. Richardson, an Ottawa native and veteran of 1,415 NHL games, had two goals and nine points in 76 games last season, his first with the Senators.
Capitals 4, Bruins 3
Chris Bourque broke a 3-3 tie with a power-play goal at 17:45 of the third period to give Washington the win. Sergei Fedorov and Brooks Laich assisted on the winner.
Chris Clark and Boyd Gordon traded first-period goals with Boston’s Andrew Ference and Blake Wheeler.
Tomas Fleischmann’s goal early in the second put the Caps back into the lead before Petteri Nokelainen evened the score again early in the third period.
Devils 4, Rangers 2
Patrik Elias scored twice to lift the New Jersey Devils to a win over the Rangers, who departed after the game for Europe and Bridgestone NHL Premiere 2008, where they will play the Tampa Bay Lightning in Prague.
The New Jersey offense drove Henrik Lundqvist from the game in the second period, beating him on all four goals. Dainius Zubrus and Brian Gionta also scored for the Devils.
"We cut his losses and maybe suggested to others that they had better step it up," Rangers coach Tom Renney said of lifting Lundqvist, who had been scheduled to play the entire game.
"We gave ourselves a chance to win the game," Devils coach Brent Sutter told reporters. "If you look at all of our goals, they were all 10-15 feet from the net. We did a lot of good things."
Markus Naslund and Nikolai Zherdev scored for the Rangers, their first goals since joining the team.
Islanders 4, Panthers 2
had two goals and two assists, and Trent Hunter
added two goals and an assist to help the Islanders beat the Panthers in the first NHL game on Prince Edward Island.
Joey MacDonald made 18 saves for the victory that completed New York's week-long Canadian exhibition tour. The Islanders are 2-1-0.
Michal Repik and Drew Larman scored for Florida (2-2-1).
Stars 4, Blues 3
Rookie James Neal scored the go-ahead goal in the third period to help Dallas beat St. Louis.
Steve Ott, Brenden Morrow and B.J. Crombeen also scored for the Stars (1-2).
With the game tied at 1, Roman Polak’s slap shot from center point 10 seconds into the Blues' third power play of the night beat Dallas goalie Marty Turco to give St. Louis the lead at 1:52 of the final period. But Ott pulled Dallas even at 2 with a goal from the slot at 5:33, and Neal up the Stars in front 1:37 later, skating from behind the net and beating goalie Chris Mason with a backhander. Morrow made it 4-2 at 9:13.
David Perron's power-play goal for St. Louis at 13:16 cut it to 4-3.
Predators 3, Blue Jackets 1
Shea Weber and Patric Hornqvist each scored a power-play goal and assisted on another as Nashville beat Columbus.
Hornqvist scored the first goal of the game midway through the first period. He fired a shot from low in the left circle that beat Columbus goaltender Fredrik Norrena low to his glove side. Ryan Suter and Weber each earned an assist.
Neither team scored in the second period. The Predators did not manage a shot on goal. Columbus had 19 attempts. The Predators wasted little time scoring in the third. At the 1:49 mark, Antti Pihlstrom scored his first goal of preseason. Radek Bonk took a shot from the slot and Pihlstrom, stationed near the edge of the crease, redirected the puck past Norrena to his glove side.
Nashville extended the lead to 3-0 when Weber blasted a one-timer from just inside the blue line to beat Norrena to his stick side at 11:40. Suter and Hornqvist earned the assists.