RENTON, Wash. (AP) Two Seattle Seahawks players went down with injuries within minutes of each other during Thursday's practice.

Fullback/tight end Brandon Cottom was the first to go down without contact during one-on-one receiving drills.

As the team brought a cart onto the field to attend to Cottom, tight end Ronnie Shields fell to the turf about 20 yards away. Shields had to be helped to the sideline by a trainer and teammate Jimmy Graham before the cart could return to carry him away.

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Cottom's injury appeared to be to his left leg while Shields grabbed at his right ankle. Cottom was competing for Seattle's fullback job.

Head coach Pete Carroll said after practice that he believed both injuries were Achilles issues, though he was still waiting for confirmation on both.

Cottom and Shields add to a growing list of injuries for Seattle. Wide receiver Doug Baldwin (leg), safety Kam Chancellor (groin), linebacker Brock Coyle (oblique), defensive end Montese Overton (calf) and running backs Zac Brooks (hamstring) and Tre Madden (shoulder) all sat out practice Thursday.

Graham (knee/PUP), running back Thomas Rawls (ankle/PUP), defensive tackle Sealver Siliga (calf), tight end Cooper Helfet (foot) and running back C.J. Prosise (hamstring) were also on the sidelines.

The Seahawks also officially moved defensive end Chris Clemons to the reserve/retired list and waived long snapper Drew Ferris. In their place, Seattle signed running back Cameron Marshall and safety Keenan Lambert, who is the half brother of Chancellor.

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