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Bears defensive end Yannick Ngakoue will miss the rest of the season after breaking his ankle Sunday against the Lions.
Ngakoue, who was hurt in the fourth quarter, will need surgery, coach Matt Eberflus said.
The Bears signed Ngakoue to a one-year, $10.5 million deal during training camp to try to improve a defensive end position that was projected to be one of the worst in the league. He finished with four sacks; it was the first time in his career than he posted fewer than eight in a season.