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SANTA CLARA – Running back Marcus Lattimore got on the practice field during the 49ers’ offseason program, but he opened training camp on the sideline.
Lattimore was placed on the non-football injury list last week upon reporting to training camp. He missed all the workouts for rookies and first-year players, including two days of padded practices due to his knee and hamstring, 49ers coach Jim Harbaugh said.
Lattimore sustained a severe knee injury in his final season at South Carolina. The 49ers selected him in the fourth round of the 2013 draft, and he spent his entire rookie season rehabbing. In the offseason, he sustained a hamstring strain but still managed to take part in on-field drills.
“The trainers (and) doctors evaluate and they make those decisions,” Harbaugh said. “As an organization, we do what’s best for the member of the team – the youngsters on the team -- because that’s ultimately in our best interest.
“In talking to them, we’re doing the best thing for Marcus.”
Wide receiver Bruce Ellington and center Marcus Martin will also miss time after sustaining ankle sprains while working out on their own. The draft picks were placed on non-football injury list last week.
Harbaugh noted that both were basketball-type injuries, but the players told him they were injured during football drills.
Ellington is expected to return shortly, with Martin being next to get cleared. Rookie outside linebacker Aaron Lynch (hamstring) is also a few days away from practicing, Harbaugh said.