By . Simon Jones . Crystal Palace have signed free agent goalkeeper Chris Kettings. The 21-year-old previously played for Birmingham City and he was released from Blackpool earlier this year. Kettings has also represented Scotland at U21 level three times. Stopper: Crystal Palace have signed 21-year-old free agent goalkeeper Chris Kettings . In demand: Palace also hope to rival AC Milan for Arsenal's Costa Rican striker Joel Campbell . Manager Tony Pulis is also keen on a loan deal for Arsenal's Joel Campbell who is starring for Costa Rica in the World Cup. However, AC Milan also have an interest in Campbell as part of a £28million deal should Arsenal bid for their striker Mario Balotelli. Campbell scored eight goals in 32 league appearances while on loan at Olympiacos last season. Scorer: Palace want Campbell on loan after he scored eight goals in 32 league appearances for Olympiacos .
Kettings is free agent having left Blackpool, with three Scotland U21 caps . The 21-year-old previously played for Birmingham City and Blackpool . Palace boss Tony Pulis also hopes to sign Arsenal's Campbell on loan . Costa Rica striker scored eight goals in 32 league games for Olympiacos . He is also wanted by AC Milan as part of £28m deal for Mario Balotelli .