Tulloch, who played for Kingston College (KC) last year, scored five goals. Kelly netted three as St George's went on to record the biggest margin of victory this season.
Victory moved St George's to 17 points, one ahead of Eltham High, who stopped Charlie Smith 2-0 in another Group F encopunter.
In Group B, KC, led by Prince Samuels' hat-trick, hammered Haile Selassie 7-0.
- Anthony Foster
Yesterday's Results
Group B: José Marti 2 Ardenne 2, Innswood 1 Norman Manley 1, KC 7 Haile Selassie 0
Group C: Excelsior 4 Campion 0, Spanish Town 5 Cumberland 3, Calabar 4 Trench Town 0
Group F: Charlie Smith 0 Eltham 2, St George's 13 St Mary's College 0
Today's Games
Group A: Penwood vs Pembroke Hall, JC vs Waterford, Edith Dalton-James vs Donald Quarrie
Group D: Wolmer's vs STATHS, Camperdown vs Papine
Home teams are named first. Matches kick off at 3:30p.m.