St. Mary's are off the mark in the Sure Mobile Premier League.
They beat Corinthians 3-0 on Wednesday evening in driving rain and gale force winds.
The game was originally scheduled for last Saturday but the pitch was waterlogged.
Stephen Glover, who moved to St. Mary's from Corinthians in the summer, scored twice with Jamie Skillen the other player on target.
Football: Three teams into FA Cup Semi-Finals
Onchan and Rushen to battle for place in final four
FC Isle of Man thrashed by ruthless Atherton
Ravens fall to joint-heaviest home defeat of season
FC Isle of Man to host in-form Atherton LR
Visitors currently on eight-match winning streak
Hockey: Cup semi-finals await this weekend
Places in April finals up for grabs in last-four phase
Rugby: Douglas' play-off quest to continue against Firwood Waterloo
Vagabonds Ladies to welcome Bury to Ballafletcher