Maguire, 25, was delisted by the Saints after failing to make a senior appearance in 2009, but Ratten said the versatile big man would be given the chance to prove his body was still up to the rigours of AFL football after a wretched run with injury in recent years.
"Steven Icke spoke to his manager, Paul Connors, and he'll come down and train with us," Ratten told afl.com.au exclusively.
"It will give us a chance to just to see where his body is at and to have a look at him with our group.
"I suppose like all players that you get down to train with you, they get to put their best case forward and if he does everything right he'll be a chance."
A small group of mostly-inexperienced Blues kicked off pre-season training last Monday, but Maguire will likely begin his bid for an AFL lifeline when the majority of senior players go back to training next Monday.
After fighting back from a horror leg fracture late in the 2006 season, Maguire was beset by stress fracture issues in his foot which limited him to just 14 senior games in 2007 and 2008.
He managed to stay healthy for most of the 2009 campaign, but the emergence of former Hawk key defender Zac Dawson saw him to confined to the VFL for the entirety of the club's season.
The Blues face the challenge of reshaping their forward line following the controversial departure of Brendan Fevola and Ratten said Maguire's versatility was appealing.
"He's a tall who can play forward and back," he said.
"He came out of a team that played in the grand final and was a kick away from actually winning it. He couldn't force his way in there, but he had a fairly good season [in the VFL] so we'll take the opportunity to have a look at him."
Maguire, a second-round draft pick (21st overall) in 2001, was left stranded on a career games total of 99 when the Saints let him go.
Meanwhile, speculation the club had been looking at former Melbourne high flyer Russell Robertson has proved unfounded with Ratten revealing former Crows speedster Aaron Kite was the only other discard the Blues would consider ahead of December's pre-season draft.
"He's already here and started with the boys this week," he said of the former Calder Cannon who Adelaide picked 71st overall at the 2007 NAB AFL Draft.
"He's really quick, is 190cm and can play off half-back so we'll have a look at him too."
