Brad Jacobs continues strong start at Brier as only 3-0 rink
Brendan Bottcher matches record for largest comeback
Brad Jacobs' Northern Ontario rink sits alone atop Pool A at 3-0 heading into Monday's draws.
Manitoba's Mike McEwen, Saskatchewan's Kirk Muyres and the wild-card team skipped by Brendan Bottcher were all 2-1.
Quebec's Martin Crete, Prince Edward Island's John Likely and Yukon's John Solberg were 1-2 and Andrew Symonds of Newfoundland and Labrador was winless in Pool A.
Canada's Brad Gushue, Alberta's Kevin Koe and B.C.'s Jim Cotter were tied for first at 2-0 in Pool B. Nova Scotia's Terry Odishaw and Nova Scotia's Stuart Thompson were knotted at 1-1.
WATCH | Mike McEwen posts convincing win over Martin Crete:
Ontario's Scott McDonald, Jamie Koe of Northwest Territories and Nunavut's Dave St. Louis were still seeking their first Pool B wins.
Bottcher matched a Brier record by digging out of a 5-0 hole and beating Mike McEwen's Manitoba squad 9-8 in extra ends.
No team has ever overcome a larger deficit at the national men's curling championship. And the Bottcher didn't stop etching his name into the record books there.
WATCH | Bottcher launches record comeback for extra-ends victory:
Earlier in the day, Bottcher's wild-card rink thumped P.E.I.'s Likely rink 14-4.
Bottcher was a point short of setting a modern-day Brier record for the most points scored by one team in a single game.
The top four teams in each pool at the conclusion of the round robin Wednesday advance to the championship round, from which four Page playoff teams will emerge.
WATCH | Stuart Thompson downs Terry Odishaw:
With files from CBC Sports