Adrian admits an ex-teammate - and Scouser - at West Ham United helped secure him a move to Liverpool.
Merseysider Aaron Cresswell, formerly of Tranmere Rovers, urged Reds goalkeeper coach John Achterberg to go for Adrian after Alisson broke down at the start of the season.
Cresswell knows Achterberg from their time together at Prenton Park.
Adrian told the Telegraph: "I only knew it after I signed.
"So thank you Cress for having had a good word for me."