Rovers will face Bury and Rochdale in this season's Checkatrade Trophy.
The 16 groups have been confirmed this Friday with Tony Mowbray's side paired with their League One counterparts.
The fourth team will be confirmed next Wednesday 12th July when the draw for the Category 1 clubs will take place.
The group stage fixtures will also be confirmed on that date.
Category 1 teams: Everton, Leicester City, Manchester City, Middlesbrough, Newcastle United, Stoke City, Sunderland, West Bromwich Albion.
Category 1 teams: Brighton & Hove Albion, Chelsea, Fulham, Reading, Southampton, Swansea City, Tottenham Hotspur, West Ham United.