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Following up on a previous item. ... After not practicing Wednesday, wide receiver Sammy Watkins (calf) participated in individual drills at the start of Thursday's practice.

Watkins said Wednesday that he would test his injured calf Thursday before the Bills would make a decision about his status for Sunday's game against the Tennessee Titans. According to ESPN.com's Mike Rodak, Watkins' participation in individual drills is a positive sign for his availability for Sunday.

Rodak noted that eporters are only allowed to view stretching and individual drills, so it's unclear how much Watkins participated in team drills during practice.

Running backs Karlos Williams (concussion) and LeSean McCoy (hamstring) did not participate in Thursday's practice, further suggesting that they won't play Sunday. If neither can play, expect Anthony Dixon to start at running back for Buffalo.

Percy Harvin (hip) returned to practice Thursday after sitting out Wednesday.