Jack Sullivan, the son of West Ham United joint-chairman David, has announced the Hammers have signed former Birmingham City goalkeeper Darren Randolph on a free transfer.

The 28-year-old will move to Upton Park after two hugely successful seasons at Birmingham City.

Randolph, who is a full Republic of Ireland international, rejected the offer of a new deal at the end of the season with the Blues announcing he would leave at the end of his contract.

Born in Bray, County Wicklow, Randolph began his professional career with Charlton Athletic but made just 20 appearances for the Addicks in all competitions before leaving for Motherwell in 2010.

Randolph had garnered plenty of first-team experience away from The Valley with a series of loan spells at Gillingham, Bury, Accrington Stanley, Welling United and the now defunct Hereford United.

And, after impressing in the SPL with Well, Randolph headed south once more to join the Blues in the summer of 2013 on a two-year contract.

A virtual ever-present during his time in the Midlands, Randolph made 91 Championship appearances for the St Andrews club, missing just one league fixture due to suspension.