Bertuzzi tied the game 1-1 at 19:38 of the second period on a power play when he tipped a shot from Hronek past Hill's stick.
Leddy scored his first goal of the season at 1:48 of the third period to give Detroit a 2-1 lead before Viel tied it 2-2 at 3:18.
"It wasn't our best period," Leddy said. "They did a good job getting the puck in deep and getting on us. We shot ourselves a little bit in the foot at times. We're a team that needs to do what they did in the third."
NOTES: Red Wings forward Riley Barber, recalled from the taxi squad Tuesday, skated one shift in the first period before sustaining a lower-body injury. There was no update after the game. … Couture has six overtime goals, third in Sharks history behind Burns and Patrick Marleau, who each have 10. … Meier has scored eight points (two goals, six assists) in a five-game point streak. … The only other defenseman in NHL history to have consecutive three-assist games at age 36-plus was Red Wings defenseman Nicklas Lidstrom (Jan. 30-Feb. 2, 2007), also at age 36... Sharks defenseman Erik Karlsson had four shots in 24:43 after missing two games in COVID-19 protocol. … Dahlen had two assists to end an eight-game point drought. … San Jose forward Adam Raska had three hits and was plus-one in 6:24 in his NHL debut. ... Bertuzzi has scored 10 points (eight goals, two assists) in the past eight games. … Leddy's last goal was April 18 with the New York Islanders. He was acquired in a trade July 16. … San Jose outshot Detroit 40-19.