Theresa Breen (Halifax, NS) lost 5-3 to Tori Koana (Yamanashi, JPN) in the Final of the Dave Jones Stanhope Simpson Insurance Mayflower Cashspiel, held November 1 - 3, 2019 at the Mayflower Curling Club in Timberlea, Canada. To advance to the championship game, Breen won 6-3 over Suzanne Birt (Charlottetown, PEI) in the semifinals of the 2019 Dave Jones Stanhope Simpson Insurance Mayflower Cashspiel in Timberlea, Nova Scotia, Canada; and won 5-3 over Mary-Anne Arsenault (Darthmouth, NS) in the quarterfinals. of the 2019 Dave Jones Stanhope Simpson Insurance Mayflower Cashspiel in Timberlea, Nova Scotia, Canada;
 
Breen finished 2-2 in the 12-team qualifying round. . In their opening game, Breen defeated Mary Myketyn-Driscoll (Halifax, NS) 6-1, then went on to lose 6-3 against Birt. Breen responded with a 7-4 win over Arsenault. Breen went on to lose 8-6 against Colleen Jones (Halifax, NS) in their final qualifying round match.
 
With their runner-up finish at the Dave Jones Stanhope Simpson Insurance Mayflower Cashspiel, Breen take home 15.727 world rankings points along with the $2,000CDN prize. Breen move up 33 spots after posting a net gain of 13.93 points improving upon their best 5 results so far this season, ranking 101st overall with 33.298 total points on the World Ranking Standings. Breen ranks 86th overall on the Year-to-Date rankings with 20.716 points earned so far this season.