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Jeffries (concussion protocol) is out for Tuesday's contest against the Pistons.

Jeffries will have to wait to make his preseason debut with the Knicks after being placed in concussion protocol. The 25-year-old forward signed a training camp deal with New York during the offseason after appearing in three contests with the Grizzlies last year. Jeffries' next chance to take the floor comes Friday against the Pacers.

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