The first Chargers preseason game has added significance this month.

One way or another, it'll bring clarity to Philip Rivers' contract situation.

The Chargers will host the Cowboys on Aug. 13. If the quarterback and team have not agreed to an extension by then, they aren't expected to this year, sources said Sunday. Negotiations between the two sides are considered amicable. There is thought to be a general understanding that talks will be revisited in 2016 if no deal is completed soon.

Rivers is entering the final year of his contract.

His preference is for discussions not to linger much further toward the season.

The sides have communicated off and on — mostly off — since the April 30 to May 2 draft. For several months, team executives and coach Mike McCoy consistently have made their desire clear, expressing hope Rivers will remain part of the franchise's long-term future and one day retire as a Charger.

In camp, Rivers seems unaffected by the uncertainty.

The 33-year-old is off to another productive one, building a rapport with new wide receiver Stevie Johnson.