Ex-Ewood defender Gordon Greer will remain with Rovers for the rest of pre-season as he bids to impress manager Owen Coyle.
The 35-year-old, who was released by Brighton in May, linked up with the club at the weekend and played the second half of Saturday's 1-1 draw with Blackpool.
Greer is no stranger to the club, having initially joined from Clyde in 2001. However, the Scotland international made just one appearance for Rovers - in a 2-0 League Cup victory over Oldham Athletic - and spent time on loan at Stockport County, before returning north of the border with Kilmarnock in 2003.
Spells with Doncaster Rovers and Swindon Town followed, before Greer joined Brighton in 2010 and the defender would go on to make 234 appearances and captain the south-coast club, who lost to Sheffield Wednesday in last season's play-offs.
"Gordon did fine," said the Rovers boss, who remains eager to strengthen his squad ahead of the big Championship kick-off on August 6th.
"I spoke to him on Friday night and he only came in on Saturday morning and met the group, but we know he's a consummate professional and he's had a wonderful career.
"He played at a very high level last season with Brighton, who only narrowly missed out on promotion, and you saw the quality of his play.
"He wanted to come in and show that he wants to be part of it, so we'll give him the opportunity to do that in the next couple of weeks, but we'll continue to monitor and look at other things and other players who we think we can add to the squad."
Coyle also confirmed that former Manchester United and Sunderland defender Wes Brown will remain with the club for the foreseeable future, as he bids to get back to full fitness.
"Wes had a calf strain and to be fair to him, there was two or three times that he tried to train on it when, as much as he's an experienced player, I think he had that enthusiasm that you want to be a part of it," added the manager.
"We got him scanned and we saw that there was a little cause for concern in respect of what it was, so we'll probably have to shut him down for a week in terms of not doing anything, but we're hopeful that at some point next week he'll start to train and hopefully we'll start to get him some games and then we'll take it from there.
"But he's been a wonderful influence about the place and he's frustrated because he wants to train and he wants to play, as we all are, but it's important that we do things properly and professionally and manage it correctly."