The Irishman has been released by the Championship side following their relegation to League One.
O’Dea was of course a promising prospect at Celtic, but he never truly made the grade - always struggling to make the first-team at the Glasgow club.
In fact, perhaps the most memorable spell of his career would have been one of his loan deals. Time at Reading and Ipswich had its ups and downs, but he featured more in one season for Leeds United then he had any other with The Bhoys.
But his time at Elland Road was mixed. Occasionally looking talented and assured, and then making the odd costly mistake. At the end of the 2011-12 season, Neil Warnock decided not to sign him permanently.
He went on to sign for Toronto FC, on a free transfer, becoming club captain. He then spent time in Metalurh Donetsk in Ukraine, before joining Blackpool earlier in the season.
Now he is a free agent again, but believes he still has plenty to offer if anyone is keen on his signature:
“You’re at the mercy of other people but if you look at my CV, I’ve been around for long enough now. So hopefully I’ll get something sorted quickly.
“I’ve played more than 250 club games, never below the Championship, and I was in the SPL with Celtic.
“I’ve 20 international caps, so I think it’s fair to say I could do a job for someone.
“But in the end it’s down to who needs a central defender and who fancies me for their team.”
Leeds and Celtic are both in need of a central defensive option, although neither is likely to be making a move for the player.
He played 19 games for The Seasiders this season but could not help the doomed club to survival this season.
Now it will be interesting to see if he can find another Championship club keen on his signature.