According to Football Insider, the 29-year-old is being looked at as a replacement for the injured Fabianski and the Hammers have already made their move.
As per the report, West Ham have submitted a £7m bid for the player.
West Ham cannot afford to rely on David Martin to play every game for now and they must look to sign someone better.
David Moyes is already under pressure to improve his side’s performances and he will need proper signings.
Etheridge has been linked with a move away from the Welsh club and he could prove to be a good addition to the West Ham side.