ST. JOSEPH, Mo. _ The Chiefs got an early look at their running back insurance plan Sunday morning.
While the team escaped a dreary, rainy Sunday morning practice without major incident, injuries and practice limitations prevented the Chiefs' top three running backs from participating in 11-on-11 drills.
Running back Charcandrick West, who left Saturday's practice early after a hit to the head, was officially diagnosed with a concussion and is in the league's concussion protocol. The Chiefs didn't give a timetable for his return.
With West out and Kareem Hunt (hamstring) and Spencer Ware (knee) limited, Damien Williams took the bulk of the first-team snaps in 11-on-11 work.
Williams, who played the last four seasons with Miami, was acquired in the offseason on a one-year, $1.5 million contract. He was primarily a backup with the Dolphins, but he had a career-high 181 rushing yards last season.
The Chiefs were also without wide receiver De'Anthony Thomas (leg), cornerback Ashton Lampkin (knee) and linebacker Reggie Ragland (knee). The Chiefs said Thomas needed a rest day for his leg, which he broke against Denver in December.
Cornerback Keith Reaser left practice early with a left quad injury.
