Bognor keeper Mark Zawadski may move on after the club recruited up-and-coming stopper Will Britt on loan from Southampton.
The Rocks have completed a long-term loan deal for Britt, who is 18 and 6ft 2in. He joined Southampton two years ago from Brighton to benefit from their acclaimed academy.
Having graduated from the academy he has now signed a contract at the club and has played already for the under-21 team this season against Liverpool and Stoke City.
Last season he spent a period on loan at Norwich City, helping them win the FA Youth Cup, playing in both matches of the two-legged final against Chelsea.
A Rocks spokesman said: “With a total of almost 40,000 fans watching both matches he is unlikely to be phased by the crowd at Cray Wanderers on Tuesday!”
Rocks manager Jamie Howell said: “We always want the best possible player in each position and although Mark Zawadski has done really well for us this season, we have an opportunity to take a young player who has the potential to make it at a higher level.
“I am extremely grateful to Mark for all his efforts for the club, and quite understand that he may wish to play first-team football regularly elsewhere.
“We are also very grateful to Southampton for allowing us the opportunity to take such a good prospect who will stay with us until the end of the season. Hopefully the opportunity to play competitive football regularly will help in the further development of Will’s game.”
The Rocks are due to play away to Hendon on Saturday but a flooded pitch means the game is highly likely to be called off.