The Irish international is concerned the club could face relegation again.
“I didn’t take this job because I was close to the chairman – I took this job because I wanted to be a football manager.
“I thought that if I could keep Blackpool up it would be a fantastic achievement. It’s turned into a nightmare.
“Once I got here, things were more deep-seated than I thought. It’s really knocked me.”
The Seasiders were relegated from the Championship this term after finishing bottom of the table and a fan protest against club chairman Karl Oyston at the final game of the season spilled over into a pitch invasion. The game v Huddersfield Town was suspended and will not be replayed.
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 hopes Blackpool can come good. But he spoke to the Blackpool Gazette earlier in the week, and he seemed adamant Clark had to stay at the club:
“The manager was fantastic. I feel for him and I feel for the players who are going to be there, because if Blackpool don’t get their finger out they could potentially go down again.
“They were in the Premier League three years ago? Sometimes you wonder ...
“I think that if Clark gets his way, then Blackpool with be fine. But as manager there, I wouldn’t say getting your way is the easiest thing.
“There are some lovely people there but the club is poorly run and they are going to struggle.”
It seems the two departing men are both concerned over the long-term future of the club, as are the fans.