Hearts currently top the section after winning 2-0 away to Cowdenbeath while Dundee United defeated Stenhousemuir 2-1 at Ochilview.
Ross County saw off Brechin City 4-0 at Glebe Park to make it two wins out of two while Montrose shocked St Johnstone 1-0 at Links Park.
Alloa Athletic and Elgin City drew 3-3 at the Indodrill Stadium, with City winning the shoot-out bonus point. Stirling Albion host Arbroath at Forthbank on Wednesday.
Peterhead are top after beating Inverness CT 11-10 in an incredible shoot-out after a 0-0 draw at Balmoor. Cove Rangers play Dundee on Wednesday.
Morton thrashed Dumbarton 6-1 at Cappielow in their opening game while Queen of the South beat Annan Athletic on penalties after a 3-3 draw at Palmerston.
Partick Thistle defeated Queen's Park 2-1 at Airdrie to stay top of the group, with Clyde playing Hamilton Accies at Ochilview on Wednesday.
Livingston are the leaders following their 2-1 home victory over Ayr United while Falkirk won 1-0 at home to Stranraer.
Both games are on Wednesday - Dunfermline Athletic play Albion Rovers at East End Park and St Mirren take on Edinburgh City in Paisley.