According to ESPN NFL Insider Adam Schefter, Bosa will not report to training camp on Friday as he remains unsigned due to his contract dispute with the team.
A spokesperson for the Chargers declined to comment on the report
Rookies and veterans are scheduled to report for physicals at Chargers Park on Friday, with the first day of training camp scheduled for Saturday.
Bosa missed one day of organized team activities and San Diego's mandatory minicamp due to issues with his contract earlier this summer. Points of contention in the negotiations include offset language and the earlier payment of signing-bonus money. The deferred signing-bonus payment appears to be a bigger hurdle.
Traditionally, the Chargers have included offset language in players' contracts to protect the franchise from paying a player's full salary in the unlikely event that San Diego releases a player during the guaranteed portion of their deal.
Offset language allows the organization to pay the remaining portion of a player's salary not covered by the new team that signs the released player. Without offset language, a player can "double dip," receiving a full salary from his previous team along with whatever money is negotiated with the new team.
The Chargers also have heartburn over paying a portion of Bosa's deferred signing bonus sooner.
Again, traditionally the Chargers defer or extend the payment of some of the signing-bonus money over the life of a rookie contract. Bosa's camp would like some signing-bonus money paid earlier.
"It really just comes down to generally this -- there's some things that are negotiable, and money always is negotiable, obviously -- but there's certain things in contracts language-wise, whether you're picked third, 33rd or 203rd, there's certain things of consistency and doing things the same way for everyone on the team," Chargers general manager Tom Telesco said regarding Bosa's contract situation earlier this week.
"And we're far from uncommon with how we work. I know a lot of other teams probably operate the same way. We try to keep some things constant in everyone's contract, whether you're Philip Rivers or the 85th guy on the football team. So that's kind of where we are. We're still working through it."