21-1-10: Matthew Kilgallon has become Sunderland's first signing of the January transfer window. The centre-half joins the Black Cats for an undisclosed fee from Championship outfit Sheffield United and has penned a three-and-a-half-year deal at the Stadium of Light. 19-8-10: Sunderland defender Matt Kilgallon has signed with Middlesbrough on a season-long loan deal, the Championship club has confirmed. 13-1-11: Sunderland defender Matt Kilgallon has joined Doncaster on loan until the end of the season Rovers chairman John Ryan said: "We're delighted to welcome Matt to Doncaster Rovers. "The major shareholders of the board have once again clubbed together to show ambition by bringing in another player of Premier League quality."