Crystal Palace striker Fraizer Campbell has been ruled out for six weeks with a hamstring injury.
Fellow strikers Marouane Chamakh and Yaya Sanogo will also be missing for Saturday's trip to West Ham.
Manager Alan Pardew said: "Fraizer's done very well for me so we will miss him. We're missing Yaya and Chamakh so there's a bit of firepower missing which is a shame at this stage.
"It's not too long for the other guys and hopefully we'll see the before the end of the season."
