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Running back Marcus Lattimore’s status is “up in the air” after reporting soreness in his right knee and being held out of practice on Friday, a source close to Lattimore said.
When asked if Lattimore experienced a setback in his comeback attempt two years after sustaining a severe knee injury, 49ers coach Jim Harbaugh said, “He hung back in the training room.”
Harbaugh added, “We’ll see what exactly it is, (when) we have some more information for you.”
Lattimore remains on the team's non-football injury list. Players on NFI are not eligible to play in games until they're activated to the 53-man roster.
Lattimore had two days of practices this week that were believed to be his most strenuous football workouts since he tore three knee ligaments on Oct. 27, 2012, as a star running back at South Carolina.
The 49ers selected Lattimore in the fourth round of the 2013 draft. He spent his entire rookie season on NFI.
Lattimore was cleared to begin practicing on Wednesday, which opened a 21-day window at the end of which the team must decide to place him on the 53-man roster, release him or keep him on NFI for the rest of the season.