St John's provided the shock of the round so far during last night's NK Joinery Hospital Cup first round, knocking St Mary's out on penalties.
It finished 1-1 after normal and then extra-time via goals from Josh Thomas and Wes Kitching for St Mary's and St John's respectively.
But it was the Westerners who kept their nerve during the shootout, taking it 3-1.
The evening's remaining ties went very much to form.
Union Mills fired in six at home to Malew, with goals from David Hicks, Steven Quine, Michael Collister, Dean France and a Carl Dobbin brace.
And Old Boys beat Marown 6-1 at Blackberry Lane.
Gary Quirk grabbed a couple and there were also goals for Sean Gavin, Liam Buckley, Craig Stewart and Drew Ward.
The other first round matches will be played a week on Wednesday, April 30.
The draw for the next round will be made by Chairman of Fixtures Tony Mepham live on The Back Page on Manx Radio that evening.
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