Carragher teased the new Liverpool signing Xherdan Shaqiri on social media following the official announcement.
He posted a light-hearted Instagram post which showed him shaking hands with a muscular look-alike in a boxing club.
"Delighted to help Xherdan Shaqiri with his Liverpool medical," he joked. "Looks ok to me!"
Then, on hearing that the Swiss international would wear the No 23 shirt, Carragher created another tongue in cheek instagram post.
July 13, 2018
"Score as many as me in the 23 and you'll be a bargain!," he wrote in a reply to the photo of Shaqiri in the shirt. "Look after it Shaq."
Carragher netted just five times in 737 appearances for the club, and is tied with Martin Skrtel for the second-most own goals in Premier League history, with seven.