Thumbs-up for Chargers QB Philip Rivers

We have likely seen the last of Philip Rivers play until the Chargers' season opener on Sept. 13. AP Photo/Denis Poroy

A quick observation of quarterback Philip Rivers and how he has played in preparation for the season opener on Sept. 13 against the Detroit Lions.

Efficient is probably the best way to describe how the San Diego Chargers quarterback performed during preseason play.

Rivers played one series in the first preseason game against the Dallas Cowboys and the entire first half in the third exhibition against the Seattle Seahawks.

"It's important for different guys and how many games you played in your life," Rivers said when asked about the importance of playing in preseason games. "You gain certain things each time you're out there. Traditionally the third game is the one you play a little more, and it's really the time that we're all out there together until the opener."

Rivers led the Chargers to scores on three of his six drives -- two field goals and an 8-yard touchdown run by Danny Woodhead in San Diego's opening drive against the Cowboys.

In the preseason, Rivers has gone 15-of-21 (71.4 percent) for 160 yards, no touchdowns and no interceptions. He was sacked twice and posted a 93.4 passer rating.

Rivers was hit four times against the Seahawks, but got up each time and appeared fine physically. That's a good sign considering Rivers dealt with back and rib injuries that affected his play last season.

Rivers did hit his hand on Seattle linebacker's Kevin Pierre-Louis' hand following through on a pass at the end of the first half. However, X-rays were negative, and Rivers said he was fine after the game.

With the Chargers hitting the road to face the San Francisco 49ers in the team's final preseason game, Rivers likely will be watching from the sidelines. Rivers did not play in the final exhibition in 2014 against the Arizona Cardinals.

He doesn't need any more reps. Rivers showed through his play that he's knocked off the rust and is ready for San Diego's regular-season opener.