Auston Matthews scored his second goal with three seconds on the clock in overtime, and the Maple Leafs matched their best NHL start in 84 years with a 4-3 win over the Buffalo Sabres.
The Maple Leafs won their fifth straight game and improved to 20-8.
The only other time in took them just 28 games to reach 20 wins was when they opened the 1934-35 season at 20-6-2.
Patrick Marleau scored with 5:13 remaining in regulation to force overtime.
Jake Gardiner also scored and Mitchell Marner had an assist to give him 11 in five games. Frederik Andersen stopped 38 shots to win his fourth straight.
Jack Eichel scored twice for Buffalo, which dropped to 0-2-2 since equaling the franchise record with a 10-game winning streak.
When @AM34 wins it in @EASPORTSNHL OT, you know it's gonna be electric. pic.twitter.com/NpkrkEat7s
— NHL (@NHL) December 5, 2018