Looking for a scouting report on how Marcus Lattimore's first practice of the 2014 season went for the San Francisco 49ers running back?

“It was good, very good ... great to see him out there,” Niners offensive coordinator Greg Roman said Thursday. “He worked with [running backs] Coach [Tom] Rathman after practice extra and got with some of the defensive players and got some contact work, which was really good. And I know they looked at that this morning in a pretty early meeting.

“He’s got his window and there’s a good plan in place to kind of progress him through that window and see where he’s at. Was pretty darned pleased.”

Lattimore -- the 49ers' fourth-round draft choice in 2013 out of South Carolina -- tore every ligament in his right knee and dislocated the kneecap in Oct. 2012, and began this season on the physically unable to perform list. And with Wednesday’s practice, a 21-day window has opened for him, at the end of which the Niners have to decide whether to activate him or place him on season-ending Injured Reserve.

What does the 49ers coaching staff need to see out of Lattimore in these three weeks to assure him of a spot on the 53-man roster?

“Really, just constant improvement throughout these next three weeks, and just how he moves,” Roman said. “Really, everything about his game, there’s just a way it should look, just seeing that come into focus.”

Keep in mind, Lattimore has not had any full football contact since suffering the injury, so simulating full-speed collisions might not be in the best interest of the team, even if Lattimore is in desperate need if a good hit.

“It will take some time,” Lattimore said with a grin.

Roman said Rathman will work with Lattimore on such high-risk hits as chop-blocks.

“All the different phases of contact that they might encounter as a running back, whether it’d be pass protection, contact on the boundary as a ball carrier, contact up the middle from the right, from the left, being able to move in space with a defender as you block him, adjust to different pass rush moves, a spin move, a push-pull, a swim, all those different types of things,” Roman said.

“And ball-security work as well. It’s pretty well-rounded.”