West Ham manager Slaven Bilić was happy the Spaniard signed on, saying "Adrian was out of contract but we have an option on him and we have activated it".
Mancini has been linked with West Ham ever since Paddy Power opened up the Next West Ham Manager Betting last month, but the biggest move in the market came today (Thursday) after the Italian's odds were slashed from 7/2 to just 4/7.
Given that neither Burnley nor West Ham have nothing much to play for, Sunday's game could prove to be a low-key affairs. They have lost their last three concluding games, all coming on the road.
However, Bilic was adamant his current squad have enough leaders in the dressing room who have helped with overcoming hard periods this season.
According to the Daily Mail, West Ham United have held talks with John Ruddy, who is set to leave Norwich City later this summer on a free transfer.
The New Zealand worldwide has undergone season-ending surgery on a chronic knee injury which he has played with for the past few weeks.
An indifferent performance this season at one stage saw Bilic's side flirt with the Premier League relegation zone.
Bilic has told reporters that West Ham want to keep Adrian at the club and that they have chose to renew terms with the veteran goalkeeper.
Despite playing his last Premier League game on January 2nd, Dimitri Payet will end the season as West Ham's most creative player in the competition this season (74) as the next best is Manuel Lanzini with 56 chances created for the Hammers.
The 18-year-old was given a new three-and-a-half year deal at West Ham earlier this season.
Burnley have got to be careful next year.