Jacobs made a double takeout to blank the seventh end in his traditional team-play showdown against Team World's Niklas Edin. And in the eighth end, the Sault Ste. Marie, Ont., native made an open hit to score one for a 4-3 victory.
Jacobs' win was part of a clean sweep of the evening games, giving Team North America a 6-3 lead on Team World. The first team reaching 30.5 points by Sunday's final day will win the title.
"That feels great," said Jacobs, who will skip Canada at the Winter Olympics in Sochi, Russia. "That was my first game ever, all of our (his teammates) first games, at the Continental Cup and that was a blast."
"That was a no-risk shot," said Jacobs of the blank attempt in the seventh end. "If we hit one of the back ones and give up a steal, it's not the worst, coming up with hammer. It was a no-fear shot; I threw it real aggressive and it worked out perfect."
In other action, Team North America's Rachel Homan of Ottawa was a 6-4 winner over Team World's Margaretha Sigfridsson. Homan's rink stole a deuce in the sixth end to turn the game around when Sigfridsson's last-rock thrower, Maria Prytz, couldn't execute a hit-and-roll to score.
"Just barely," said Homan about the victory. "But that was good. My whole team played well and so did Sigfridsson's. Pretty excited about the three-team sweep tonight."
In the other evening game, Team North America's John Shuster hung on for a 5-3 win over Team World's David Murdoch. Shuster, who will skip the United States in Sochi, scored two in the fourth end and never looked back.
Team World won two of three traditional team games in the morning draw of curling's version of the Ryder Cup, and Team North America won two of the three mixed doubles matches in the afternoon.