ALLEN PARK — Wide receivers Calvin Johnson and Titus Young were among the seven players who didn’t participate in practice today (Wednesday). Both have been dealing with knee injuries.

  Johnson didn’t practice at all last week and then on Sunday had seven catches for 129 yards.

  Louis Delmas (knee) also did not practice. He re-injured his knee two weeks ago and hasn’t practiced or played since.

  Another safety, Amari Spievey, has not been cleared for contact since he suffered a concussion on Oct. 22.

   Cliff Avril (back) has been taking days off at practice each week as has Corey Williams (knee). It was a rest day for Kyle Vanden Bosch.

 The Lions (4-4) play at Minnesota (5-4) on Sunday. A win would put them in third place in the NFC North.

The Vikings wide receiver Percy Harvin twisted his ankle Sunday, was on crutches on Monday and is unlikely to play.

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