Dumbarton have completed the signing of former Hamilton Academical and Wigan Athletic midfielder Jon Routledge.
The Englishman, 25, has signed a one-year deal with the Scottish Championship club.
Sons boss Stevie Aitken has also persuaded Celtic defender Calum Waters, 19, to join on a one-year loan.
"I'm delighted to have signed Calum and I'm grateful to Celtic for their co-operation," Aitken told the Dumbarton website.
"He's a highly rated player and everyone at Celtic speaks highly of him so when he became available to us, it was a no-brainer to add Calum to the squad."
Routledge spent 10 years at Liverpool's academy before leaving to join Wigan Athletic where he made just one appearance in two and a half years.
He made 17 appearances last season for Hamilton Accies, his second spell at the club.