ALLEN PARK, Mich. (AP) -Detroit Lions rookie receiver Calvin Johnson is unsure if a back injury will prevent his playing Sunday against the Chicago Bears.
Johnson, the No. 2 pick in April's draft, was injured during Detroit's 56-21 loss to the Philadelphia Eagles when he landed hard on his back while catching a pass.
``I went up for it and got spun around, and obviously, hit pretty hard,'' he said Monday. ``I've never had anything like this, so I'm not sure what to expect. I'm getting treatment and we'll see what happens.''
Lions coach Rod Marinelli said tests only showed bad bruising, and Johnson was moving very gingerly at the team's practice facility on Monday. Marinelli said he considers Johnson ``day to day''.
Johnson has 10 catches for 189 yards and two touchdowns in three games.

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