Manager Tony Mowbray insists Rovers will continue to try and strengthen the squad, following the capture of long-term target Sam Gallagher from Southampton.
The Rovers boss had previously secured the signatures of experienced midfield pair Stewart Downing from Middlesbrough and Bradley Johnson from Derby County, ahead of Gallagher's arrival over the weekend.
Mowbray says that discussions with clubs remain ongoing and he is confident more new faces will arrive ahead of the big Championship kick-off on Saturday August 3rd.
"It never stops," said the manager. "It's not as if we only do one and get that one and then move on to the next one.
"They're all going at the same time, it's just that they happen faster or slower.
"Sometimes you have a target and for whatever reason that target disappears off the radar - somebody else signs him or he signs a new contract or the club refuses to sell him - and you have to move on to the next target.
"That's happened once or twice. We're just moving on, we're trying to get to where we want to be.
"We need a few more players and hopefully in the next few weeks those players will arrive and then we'll go to battle in the Championship and give it our best shot."