Cardiff maintained their five-point lead at the top of the Championship despite being held to a 1-1 draw at home to Derby
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Derby County have completed the signing of Doncaster defender James O’Connor for an undisclosed fee.
The 27-year-old has signed a two-year deal with the Rams.
Manager Nigel Clough said: “He’s versatile and can play right across the back four, and it’s great to have someone like that in the squad."
Nigel Clough signed centre-back Richard Keogh from Coventry during the summer, and immediately made him the club captain at Pride Park.