The 22-year-old stopper, who was previously with West Bromwich Albion, has signed a one-year contract at St Mary’s.



Rose had two loan spells during his time at The Hawthorns, making his professional debut with Accrington Stanley in the FA Cup before a similar loan spell with Crawley.



Reflecting on his move, Rose said: “I came in for a week or so to get a feel for the place and show them what I could do and I’m excited to be here now.



“Everyone knows about the reputation Southampton have in bringing through young players and they give you opportunities.



“It makes it more real when you see the young players being given chances in the first-team so that’s one of my goals.



“There is a great pool of goalkeepers here who I can learn from to develop my game.



"Fraser is an England international, Stuart Taylor has a lot of experience and I trained with Alex McCarthy in the week –he was really good with me.



“Dave Watson has been with England and is brilliant at what he does, so I can’t wait to get going.”