Wales prop Adam Jones has written an open letter to Ospreys supporters after signing for Cardiff Blues.
The 33-year-old said he "couldn't wait forever" for his playing future to be resolved, in a letter published by the South Wales Evening Post.
British and Irish Lions Test tighthead Jones has been out of work since his Ospreys contract expired at the end of last season.
He has been training with his former club Neath, as any prospective new deal with the Ospreys hinged on a solution being found to the long-running and on-going dispute over a fresh agreement between the Welsh Rugby Union and Wales' four professional regions – Ospreys, Blues, Scarlets and Newport Gwent Dragons.
"I had been waiting for a deal to be struck between the regions and the Welsh Rugby Union over a new participation agreement so the Ospreys could conclude a fresh contract with me," he said.
"I haven't been getting any money, but I was just hoping that the row that has blighted Welsh rugby for so long could be finally settled and I could pull on the black shirt again.
"Then I received a call from the Blues asking whether I fancied a move there.
"I had to think long and hard because I know all about regional rivalry and how much it matters in Wales.
"But my circumstances were such that I didn't feel I could turn Cardiff down. I haven't been paid for two months and the season is barely a fortnight away. I couldn't wait forever."