Newcastle defender Celestine Babayaro has been ruled out for "two of three weeks" after suffering a groin injury in the Carling Cup win over Watford.
The Nigeria international, 28, who missed last weekend's goalless draw with Manchester City, is not likely to return until mid-December.
Roeder said: "Celestine suffered the groin injury during extra-tie in the Carling Cup game at Watford.
"It prevented him playing against Manchester City last Saturday and we're going to have to do without him for the next two or three weeks.
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"He's done very well for me and been a consistent performer when he's played, so this is unfortunate for us."