Aberdeen have signed Cheltenham Town keeper Scott Brown and Tranmere defender Ash Taylor on free transfers.
Tranmere have offered new contracts to five players as Ronnie Moore aims to boost their squad for the new League One season.
Ash Taylor has urged his Tranmere team-mates to take the positives from Tuesday's draw at Carlisle into the weekend visit of Charlton.
Les Parry has urged club fans to be realistic about Tranmere's current plight after he was criticised by supporters on Tuesday night.
Tranmere manager Les Parry believes Ash Taylor could one day become captain of the Prenton Park club.
Tranmere have been rocked by the news that Ash Taylor is facing a lengthy spell on the sidelines.
Tranmere have clinched the signing of Joss Labadie and have also handed Ash Taylor a contract extension.
Tranmere defender Ash Taylor has signed a 12-month extension to his contract with John Barnes' side.