ALLEN PARK, Mich. (AP) -- The Detroit Lions say they expected a speedy hitting machine when they drafted Ernie Sims, and so far, he's made the franchise look awfully smart.
The linebacker has led Detroit in tackles in each of his first two seasons, and he and the coaching staff think he's capable of even more.
The ninth overall pick in the 2006 draft has started all 32 games the Lions have played since he arrived.
Sims ended his rookie season with a team-high 144 tackles.
His teammates voted him a captain before his second season and he responded with 172 stops from his weak-side spot, fourth in the NFL.
The Lions are holding camp in Allen Park.
Meanwhile, an ankle sprain has kept Lions center Dominic Raiola out of practice, but the team expects him back soon.
Trainer Dean Kleinschmidt said Tuesday the eight-year veteran suffered the injury during Monday's practice. He said Raiola, who has started the last 96 games for the franchise, could be back as early as Wednesday.
Defensive tackle Langston Moore suffered a sprained shoulder Tuesday morning, but an MRI revealed no serious injury. He's listed as day-to-day.