ALLEN PARK, Mich. (AP) — Detroit Lions running back Jahvid Best has been put on the active physically unable to perform list.

Best didn’t play last season after a concussion suffered in a game against San Francisco on Oct. 16. He also had concussion problems last preseason and when he was a college player at California.

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Best started nine games for the Lions as a rookie in 2010 and rushed for 390 yards on 84 carries last season. Without him, Detroit needed to piece together some semblance of a running game to complement quarterback Matthew Stafford and star receiver Calvin Johnson.

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The Lions started practice Friday. They were forced inside by a rainstorm.

Detroit has also put offensive lineman Jonathan Scott on the active non-football injury list.

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