The Chargers waived Johnson on Sunday, Matt Zenitz of CBSSports.com reports.
Johnson participated in all three preseason games for the Chargers, rushing 15 times for 53 net yards and two touchdowns. The running back also added two receptions for 68 yards over the three-game span. Johnson will now be subject to waivers. If the 23-year-old goes unclaimed, he will become a free agent able to sign with any franchise that covets additional running back depth.