As part of Norv Turner's press conference today news came out that Stephen Cooper, playing in his first game back with the San Diego Chargers, has a torn bicep (although it keeps getting referenced as "torn biceps", which would be horribly unlucky) and will be out for 2-3 months.
Seeing as how Cooper had no real offers from the rest of the league and signed a 1-year deal for the veteran minimum to stay in San Diego, I can't see the Chargers placing Cooper on Injured Reserve unless they're terrified of him landing with a rival team late in the season.
The most likely scenario is that the Bolts will release Cooper and hold onto his phone number in case they have injuries at LB 2-3 months from now. However, with his injury history of late he may not be of much help at all going forward.
The other news to come from Turner's press conference is that Patrick Crayton will miss the last two weeks of the preseason with bone spurs and Tyronne Green is officially a contender to take the RG spot away from Louis Vasquez.
The next preseason game is this upcoming Saturday against the Arizona Cardinals. If Floyd misses the game, which it sounds like he probably won't unless they decide to be very cautious with him, the starter opposite Vincent Jackson would probably be Seyi Ajirotutu.
The team leaves for Arizona on Friday.
SILVER FOX UPDATE: According to Kevin Acee, Cooper has been placed on the Injured Reserve list after all (maybe they can't release veterans due to injury?). He will not play this season, and Acee adds that Coop's "Chargers career is over."