Cleveland Browns rookie running back Montario Hardesty has left his exhibition debut because of an injured left knee.
Hardesty, who missed all of training camp with a bone bruise in his right knee, was hurt on a 2-yard carry in the second quarter Thursday night against Chicago.
Hardesty stayed on the ground for several minutes before walking to the sideline. The team's medical staff examined him on a trainer's table before taking him to the locker room.
The team said his return was questionable.
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