Robert Thomson nodded the winner as Dumbarton beat Queen of the South to boost their Championship survival hopes.
Dumbarton slip into the Scottish Championship relegation play-off berth with a home defeat by Dunfermline Athletic.
St Mirren move off the bottom of the Scottish Championship, despite only drawing with Dumbarton and finishing with 10 men.
Lewis Vaughan scores his fourth goal of the season to give Dumbarton a win over promotion-chasing Greenock Morton.
Scores, Results & Fixtures
Saturday 22nd April 2017
Saturday 15th April 2017
Saturday 8th April 2017
Saturday 1st April 2017
Saturday 29th April 2017
Saturday 6th May 2017
|6||Queen of Sth||34||11||9||14||44||49||-5||42|
Audio & Video
A crowd of over 1,500 watched junior side Bonnyrigg Rose FC play out a 0-0 draw with Dumbarton in the third round of the Scottish Cup.