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San Francisco 49ers' Kyle Williams (10) runs with the ball during the first day of mandatory minicamp at their training facility in Santa Clara, Calif., on Tuesday, June 11, 2013. (Nhat V. Meyer/Bay Area News Group)

SANTA CLARA -- Wide receivers Mario Manningham and Kyle Williams, running back Kendall Hunter and linebacker Darius Fleming will start 49ers training camp on the active/physically-unable-to-perform list, the team announced Saturday.

Four rookies, meanwhile, were put on the active/non-football injury list: running back Marcus Lattimore, offensive tackle Luke Marquardt and defensive linemen Tank Carradine and Quinton Dial.

Wide receiver Michael Crabtree, who tore his Achilles in May, will likely be put on PUP when he reports to camp next week. The 49ers could later place him on the injured-reserve list with the one spot reserved for a player who might return.

None of the designations are surprising as all eight players had previously known injuries. Players who remain on PUP at the start of the season will have to miss the first six weeks.

Williams (knee) and Hunter (Achilles) shouldn't be sidelined long as they've shown positive progress from their respective Nov. 25 injuries. Earlier this offseason, Fleming re-injured a knee that kept him out of his rookie season and the severity of his injury is unknown. Manningham tore knee ligaments on Dec. 23 and it will be surprising if he returns for any exhibition games.


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As for the rookies, Carradine and Lattimore are coming off knee injuries. Carradine is expected to contribute this season while Lattimore is doubtful to debut until 2014. Dial had offseason surgery on his foot and his status is unknown but not believed to be too serious. Marquardt has a foot injury that kept him from participating in offseason workouts.

The 49ers rookies and select veterans reported to camp Friday. All players are due to report Wednesday, followed by the camp's first full practice on Thursday.

For more on the 49ers, see Cam Inman's Hot Read blog at blogs.mercurynews.com/49ers. Follow him on Twitter at twitter.com/CamInman.