Cardiff City captain David Marshall’s transfer to Hull City is close to being completed with the Scotland goalkeeper undergoing a medical on Monday.
He has agreed terms on a move which could be worth up to £5 million, depending on add-on fees.
Marshall was left out of the Bluebirds’ squad for Saturday’s Championship defeat by Reading.
The 31-year-old has made more than 280 appearances for Cardiff since arriving from Norwich City for free in 2009.
Cardiff City boss Paul Trollope has said he will have to wait to discover if he is able to spend the money generated by the transfer.
Marshall, considered one of the best goalkeepers outside the Premier League, was the subject of interest from West Bromwich Albion last summer and has also been linked with Everton.
His Scotland colleague, Allan McGregor, is presently with Hull but required surgery on a back injury that had him sidelined at the end of last season.
The signing of Amos and defender Joe Bennett, who has joined from Aston Villa, means Cardiff have made seven signings this summer.
Lex Immers, Kenneth Zohore, Emyr Huws, Jazz Richards and Frederic Gounongbe have also moved to the Welsh capital.