Sunderland have completed the signing of West Ham
defender Anton Ferdinand for an undisclosed fee, believed to be in
the region of £8million.
The England Under-21 centre-back has signed a four-year
deal at the Wearside club.
Keane told his club's official website: "We needed to strengthen
our defence and Anton is a great signing."
The 23-year-old Peckham-born player, brother of Manchester
United and England defender Rio, becomes Keane's ninth signing of
the summer.
Keane said: "He'll bring quality and competition for places
which is what we want, hopefully we can take him to another level
here at Sunderland.
"He has come through the ranks at West ham and maybe just needs
a change."