In 2016, Stacey played in 17 events and posted a season-best tie for 2nd at the Pilsen Golf Masters.
In 2015, Stacey played in 17 LET tournaments. Her best performances came at the BUICK Championship and the Aberdeen Asset Management Ladies Scottish Open where she finished T4 and T8, respectively. She finished the season in 17th position in the Order of Merit winning €65,225.77.
In 2014, Stacey played in 10 LET events, with her best finish (T37) secured at the Sanya Ladies Open.
In 2013, Stacey played in 16 tournaments and added four top-10 finishes to her records including a best-season 3rd at the ISPS Handa New Zealand Women’s Open. She ended the season ranked 25th on the ISPS Handa Order of Merit and finished number 1 on the Number of Eagles statistics, with a total of 6 eagles.
In 2012, her second year on tour, Stacey had a breakthrough season collecting two titles on her way to finishing 6th on the ISPS Handa Order of Merit. A week after being disqualified from the Ricoh Women’s British Open at Royal Liverpool due to signing an incorrect scorecard (she had accidentally swapped two numbers around), she earned her first trophy at the Tenerife Open de Espa?a Femenino at Golf Las Américas. She closed with a two under par 70 to come from a stroke behind Caroline Masson and tie on nine under par. She then birdied the first extra hole in a sudden death play-off. She backed up her victory at the next LET tournament two weeks later with a second title at the Lacoste Ladies Open de France at Chantaco Golf Club in Aquitaine. Keating came from three shots behind overnight leader Diana Luna of Italy going into the final round and then had to wait behind the 18th green before Luna finished with a bogey, handing the title to Keating. Her two additional top 10s were a tie for 4th at the Aberdeen Asset Management Ladies Scottish Open presented by EventScotland and a tie for 5th at the Raiffeisenbank Prague Golf Masters. In 2012, Keating and her boyfriend and caddie Darren Peters were using the AimPoint Green Reading technique which no doubt contributed to her success.
In 2011, her rookie year on the LET, recorded 5 top 10 finishes with a season-best tie for 5th at the Sanya Ladies Open in China. Also tied for 6th at the Lacoste Ladies Open de France, tied for 8th at the Allianz Ladies Slovak Open and UNIQA Ladies Golf Open and tied for 10th at the Sicilian Ladies Italian Open. Finished 3rd on the Rolex Rookie of the Year Standings and 45th on the Money List with earnings of 52,704.02 from 21 events.
In 2010, Stacey turned professional after the pre-qualifying stage of Ladies European Tour School for 2011.