Lions add CMU LB Justin Cherocci, DE Erik Williams

Josh Katzenstein
The Detroit News
Justin Cherocci, left, of Central Michigan works out with the Lions in May.

Allen Park — The Lions filled a couple of the openings on their 90-man roster Sunday.

Linebacker Justin Cherocci and defensive end Erik Williams will join the team this week, presumably to add some depth and injury insurance for Friday's exhibition in Jacksonville.

A Rochester Hills native who went to Brother Rice and Central Michigan, Cherocci tried out for the Lions during rookie minicamp in May after going undrafted. The 5-foot-11, 241-pound Cherocci led the Chippewas in tackles with 117 in 2014.

The 6-foot-3, 270-pound Williams spent most of this offseason with the Buffalo Bills after going undrafted out of Bethune-Cookman. He signed with the Bills after the draft, was cut on Aug. 6, re-signed on Aug. 9 and was cut again on Aug. 18.

The Lions had three roster spots open Sunday after waiving injured tight end Jordan Thompson (knee) on Saturday.