Amar Johnson: Everything you need to know

The Chargers signed Johnson to a reserve/future contract Tuesday. Johnson caught on with the Chargers' practice squad in late August after failing to make the Packers' 53-man roster at the end of training camp. He was elevated to the Chargers' active roster in Weeks 9 and 11 and logged two carries for eight yards while failing to haul in his lone target. The South Dakota State product will be a member of the Chargers' 90-man roster at the start of the NFL offseason Feb. 9, which will allow him to participate in OTAs and minicamp.

Johnson reverted to the Chargers' practice squad Monday, per the NFL's transaction log. Johnson logged four of Los Angeles' 48 offensive snaps Sunday in a loss to Jacksonville. He carried twice for eight yards and didn't catch his only target. Johnson's elevation came as a result of Jaret Patterson having already been elevated from the practice squad the maximum three times this season. The Chargers are on bye in Week 12, and rookie RB Omarion Hampton (ankle) could be back for Week 13 if he's activated off IR. With that being said, Kimani Vidal is currently the only healthy RB on the Chargers' active roster, so Johnson could get his third elevation at some point before the end of the campaign even if Hampton suits up two Sundays from now.

The Chargers elevated Johnson from the practice squad to the active roster Saturday. It's the second time Johnson has been elevated to the Bolts' active roster this season. He'll be available for Sunday's game against the Jaguars, when he'll join Trayveon Williams as the Chargers' rotational running backs behind Kimani Vidal. Johnson played in Week 9 against the Titans, but he was limited to just three snaps on special teams.