Middlesbrough have signed Republic of Ireland goalkeeper Darren Randolph from West Ham United on a four-year contract for a fee of £5m.

The stopper staved off competition from Spanish keeper Adrian at West Ham last season and played 22 Premier League games as the London side finished in 11th place.

But with his starting place in doubt after the arrival of Manchester City and England goalkeeper Joe Hart on a season-long loan deal, Randolph has switched to Middlesbrough, who were relegated to the second tier.

The 30-year-old becomes Boro manager Garry Monk's sixth signing in the current transfer window as the club aim for an immediate return to the top tier.

"I'm delighted to get it all signed and completed," Randolph told Middlesbrough's club website.

"Arriving here and seeing the facilities, it's definitely a Premier League club. I want to come here and get the club back to where it belongs and be part of something special."