The Kansas City Chiefs brought back C.J. Spiller a day after cutting the running back.
Nelson likely will be one of K.C.'s two IR-return options this season.
Spiller returns to the Chiefs' backfield after compiling 46 yards on 11 rush attempts this preseason. He'll be a depth option behind rookie starter Kareem Hunt and backup Charcandrick West. Last season's starter Spencer Ware is out for the season after suffering a knee injury.
The Chiefs losing Nelson, who started 15 games in 2016, for half the season is a blow. Not having their starting slot corner against the New England Patriots for the opener on Thursday is a hit to the team's depth. Phillip Gaines and Terrance Mitchell are options to start for K.C.
Here are some other notable roster moves made Sunday:
1. The Tennessee Titans have re-signed wide receiver Eric Weems after releasing him Saturday and placed wide receiver Harry Douglas on IR.
3. The Green Bay Packers officially signed linebacker Ahmad Brooks, placed offensive lineman Don Barclay (foot) on IR, and traded linebacker Jayrone Elliott to the Dallas Cowboys in exchange for a conditional draft choice.
4. The Denver Broncos have re-signed offensive tackle Kyle Peko to the active roster.