Caldwell (arm) was released from the Lions' injured reserve list Monday.
Caldwell's release is likely the result of an injury settlement, though that hasn't been confirmed. He was expected to make the team when he was signed back in May, but the signings of Anquan Boldin and Andre Roberts, coupled with his broken hand, made that nearly impossible, which is why he was placed on IR for the year and why the team decided to part ways with him.