The move announced Tuesday comes four days after Smith was released by Buffalo. The Eagles released wideout B.J. Cunningham to make room on the roster.
A versatile player on offense, Smith is known for his ability to play receiver and quarterback in wildcat formations. He's averaged 25.7 yards on kickoff returns with four touchdowns during an eight-year career with the New York Jets and Bills.
Smith has five TDs receiving, four rushing and one passing.
Smith injured his ribs in the preseason and had been on Buffalo's injured reserve list.
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