Theresa Breen (Halifax, NS) lost 5-4 to Jill Brothers (Halifax, NS) in the Final of the Dave Jones Mayflower Cashspiel, held November 17 - 20, 2016 in Halifax, Nova Scotia. To advance to the championship game, Breen won 6-3 over Colleen Pinkney (Truro, NS) in the semifinals of the 2016 Dave Jones Mayflower Cashspiel in Halifax, Nova Scotia; and won 6-5 over Julie McEvoy (Halifax, NS) in the quarterfinals. of the 2016 Dave Jones Mayflower Cashspiel in Halifax, Nova Scotia;
 
Breen finished 3-1 in the 15-team qualifying round. . In their opening game, Breen lost 6-4 to Pinkney, then responded with a 7-4 win over Kristin Clarke (Chester, NS). Breen won 7-5 against Robyn MacPhee (Charlottetown, PEI), then won 8-2 against Coralie Ayre (Sydney, NS) in their final qualifying round match.
 
With their runner-up finish at the Dave Jones Mayflower Cashspiel, Breen take home 18.189 world rankings points along with the $2,200CDN prize, moving up 5 spots the World Ranking Standings into 33rd place overall with 145.797 total points. Breen ranks 41st overall on the Year-to-Date rankings with 54.471 points earned so far this season.