Mary Mattatall (Halifax, NS) qualified for the 2017 Dave Jones Stanhope Simpson Insurance Mayflower Cashspiel playoffs, dropping their quarterfinals match 6-3 against Jill Brothers (Halifax, NS). of the 2017 Dave Jones Stanhope Simpson Insurance Mayflower Cashspiel in Timberlea, Nova Scotia, Canada;
 
Mattatall finished 3-1 in the 15-team qualifying round. . In their opening game, Mattatall lost 7-4 to Theresa Breen (Halifax, NS), then responded with a 6-2 win over Mary-Anne Arsenault (Halifax, NS). Mattatall won 8-4 against Cassandra Lewin (Carp, ON), then won 7-2 against Veronica Smith (Charlottetown, PEI) in their final qualifying round match.
 
Mattatall earned 9.324 world rankings points for their Top 5 finish in the Dave Jones Stanhope Simpson Insurance Mayflower Cashspiel, moving up 2 spots the World Ranking Standings into 63rd place overall with 69.486 total points. Mattatall ranks 71st overall on the Year-to-Date rankings with 19.126 points earned so far this season.