The 30-year-old defender is now set to link up with Republic of Ireland teammate Kevin Doyle at the Colorado Rapids, with the club confirming his addition on their official website following the sale of fellow centre-back Shane O’Neill to Appollon Limassol.
“Sean is an important addition to our roster,” Rapids technical director Paul Bravo said. “He has leadership skills and experience having played at a very high standard in English football, in addition to a long career with the Irish national team.
“Also, he has had half-a-season in MLS so he will complement our existing squad. We are sure he’ll make a valuable contribution at Dick’s Sporting Goods Park.”
St Ledger joined Orlando in March ahead of their inaugural campaign and went on to make 14 starts in 15 league appearances for the expansion side before his sudden release.
Prior to heading stateside, the Ireland international had made 302 total appearances in English football between 2002 and 2014 but had seen various injuries hamper his career in recent seasons.
At Leicester City, a reoccurring groin problem limited the 37-times capped stopper to only two appearances during the 2013-14 campaign before he was let go last summer following the Foxes’ promotion to the Premier League.
The former Peterborough and Preston North End man would then struggle to find a club until joining Ipswich Town in November on a short-term deal but failed to feature for the Championship side during his one-month spell.
He has since managed to find some form and fitness across the Atlantic but his performances for Orlando were far from outstanding and it remains to be seen how big a role he will have in Colorado over the final stages of the 2015 season.
While the Rapids are sitting bottom of the Western Conference on 24 points after 21 games, their defence has conceded just 22 goals and, with head coach Pablo Mastroeni boasting a strong centre-back group at his disposal, St Ledger is no guarantee to start.
Nevertheless, the club were desperate to add some experience to their fledgling squad and, in that respect, the English-born defender fits the bill.