Morton claimed the League 1 title with a 3-1 home win over Peterhead in front of 6,000 fans at Cappielow on Saturday.
Jim Duffy's side fell behind to a Gary McDonald goal but the Blue Toon had Scott Ross sent off midway through the first half and Michael Miller and Mark Russell struck before half-time.
Top scorer Declan McManus, on loan from Aberdeen, added a late third goal and the trophy was delivered to Greenock by helicopter on an afternoon to remember for the home team.
Stranraer finished in second place after winning 3-1 at Brechin - who face Alloa in the play-offs - with a Stephen Stirling goal and a pair of Willie Gibson penalties. Ryan Ferguson scored for City, who had Darren McCormack sent off.
Stranraer take on Forfar in the play-offs after Dick Campbell's men went down 3-1 at home to Ayr United. Dale Hilson gave Forfar the lead but Jon Paul McGovern equalised from the spot and the home side then had Michael Dunlop sent off. Jordan Preston and Alan Forrest sealed the win for Ayr, who finish clear of the relegation zone.
Stenhousemuir are preparing for a play-off against East Fife after ending in ninth place. The Warriors were beaten 3-2 at relegated Stirling Albion, who scored late on through Ross Forsyth and Andy Stirling. Gordon Smith also netted for the Binos, with Colin McMenamin and Craig Sutherland scoring for Stenny.
A Bob McHugh double helped Airdrieonians beat Dunfermline 3-2 at the Excelsior Stadium. Jordan Morton also scored for the Diamonds, with Andy Geggan and Josh Falkingham on target for the Pars.
