NFL injury roundup: Arian Foster, Marques Colston on PUP list; Kyle Williams activated

Jared Wickerham

Several key contributors are watching from the sidelines as training camps get started.

More players have been added to the physically unable to perform list as NFL training camps continue to get underway.Safety Ed Reed and running back Arian Foster are starting practice on the PUP list in Houston and Marques Colston, Percy Harvin and a few other notables are also sidelined right now.

Position battles to watch:: AFC NFC

Foster figures to be back in action soon, though Reed's timetable is uncertain after he had surgery to repair a partially torn labrum in April. Harvin is dealing with a hip injury that could potentially prove serious, possibly threatening his ability to play in 2013. He is traveling to New York next week to get a second opinion.

Elsewhere, the Saints placed wide receiver Marques Colston on their PUP list along with cornerback Patrick Robinson and linebacker Victor Butler. The Colston move appears mostly precautionary because the team wants to give him a few days to rest a foot injury. Robinson, who started all 16 games in 2012, had his knee scoped during the offseason.

Michael Crabtree landed on the PUP list while he rehabs a major knee injury that occurred in the spring. The 49ers were able to activate Kyle Williams, though, a player who is coming off a major knee injury of his own.

Jonathan Stewart is on the PUP list in Carolina while he continues rehabbing from offseason surgery on both ankles after ankle injuries costed him the majority of last season.

Additionally, the Packers have a bunch of guys sidelined for the start of camp.

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