I turned up to Liverpool trial in Everton kit - I upset fans but I had a good reason

Jamie Carragher's Everton background is well-known, and his fervent fandom of the Blues got him in hot water with Liverpool's youth coaches during his playing days

source https://www.liverpoolecho.co.uk/sport/football/football-news/liverpool-trial-jamie-carragher-everton-30503827