Johnson (oblique) is active ahead of Monday night's matchup against the Jets.
Head coach Sean McDermott told reporters Friday that Johnson (oblique) won't play in Sunday's matchup against the Texans, Alaina Getzenberg of ESPN.com reports.
Johnson (calf) was left off Buffalo's injury report Wednesday ahead of Sunday's Week 1 game against the Cardinals.
Johnson has signed a one-year contract with the Bills, Jeremy Fowler of ESPN.com reports.
Johnson made eight tackles, including five solo, in the Chargers' 63-21 defeat to the Raiders on Thursday.
Johnson (knee) will start Chargers camp on the active/PUP list.
Johnson (knee) was placed on injured reserve Wednesday.
Chargers head coach Brandon Staley said Monday that Johnson will miss the rest of the season due to a knee injury he suffered during Sunday's win over the Falcons, Daniel Popper of The Athletic reports.
Johnson (knee) is questionable to return to Sunday's game against the Falcons.
Johnson is is expected to sign with the Chargers on Monday, Ian Rapoport of NFL Network reports.