Williams was looking to bounce back from an injury-riddled 2018 campaign, where he missed seven games due to a knee injury. The Chargers tendered Williams as an RFA back in March, but a quadriceps injury limited him and will force him to IR. A UDFA out of Penn State, Williams started 15 Chargers games in 2017.
The fourth-year defender must miss a minimum of eight games before potentially returning, though one of the Bolts’ two IR-return spots is essentially spoken for. Derwin James is expected to return at some point in the regular season’s second half.
A 2014 49ers fourth-round pick, Johnson spent four years in San Francisco. He played in 63 games (22 starts) for the 49ers and caught on with three teams — the Seahawks, Bills and Cardinals — last year but did not see game action. Johnson returned to the 49ers for camp this year, but despite a three-interception preseason, he did not make their 53-man roster.