Per the Detroit Free Press:
Lewis sat out the Lions' first practice of training camp Thursday with back tightness. He's expected to contribute on special teams and as a backup lineman this year.
Lewis, who will turn 22 in September, was drafted in the fourth round of the 2012 NFL Draft, with pick No. 125 overall.
In his senior year with the University of Oklahoma, Lewis recorded five and a half sacks, forced a fumble and was awarded with All-Big 12 first team honors by coaches, and All-Big 12 second team by the Associated Press. Lewis is not expected to be an impact player in his rookie season.
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