Will Grigg scored his first league goal of the season to set up Wigan’s victory against Blackburn and their first win since returning to the Championship.
Max Power’s scuffed shot allowed Grigg to pounce and nod the Latics ahead.
Yanic Wildschut hit the bar for the hosts before Nick Powell curled a free-kick from 25 yards into the top corner to double the advantage.
Michael Jacobs’ cross then caused havoc as defender Shane Duffy bundled the ball into his own net to make it 3-0.
Gary Caldwell’s Latics, who announced the signing of Shaun MacDonald from Bournemouth before kick-off, earned their first win of the season in their first home game of the campaign.
Defeat is Rovers’ second in as many league games this season, leaving them without a point under boss Owen Coyle.
Powell, who signed on a free transfer from Manchester United in July, gave Wigan a deserved 2-0 lead after Dutchman Wildschut hit the woodwork.
Coyle faced the Latics for the first time since he left the club in December 2013, but Wigan only compounded his side’s poor start to the season, with Rovers conceding seven goals in two matches.
The visitors rarely threatened, with their first shot on target coming in the 85th minute as Wigan comfortably extended their unbeaten run against Blackburn at the DW Stadium to eight games.