Tarvaris Jackson realizes he'll need a whole lot more practice and study before he can run the Seattle Seahawks' offense with even a fraction of the poise and precision Philip Rivers gives to the San Diego Chargers. Luckily for the winning Seahawks, Jackson isn't afraid to go back to work. Rivers went 5 for 6 while leading an 89-yard scoring in his only series for the Chargers, but Thomas Clayton rushed for a tiebreaking 25-yard touchdown with 3:05 left in the Seahawks' 24-17 victory over San Diego on Thursday night in both clubs' exhibition opener. Jackson passed for 13 yards over two moderately successful series in his debut as Matt Hasselbeck's replacement with the Seahawks, who trailed 10-0 at halftime. The longtime Vikings backup also was sacked twice, and Jackson was long gone by the time undrafted rookie Josh Portis led two late scoring drives capped by Clayton's decisive romp through the San Diego defense. "I was just trying to get comfortable with a couple of snaps, just trying to get familiar with everybody," said Jackson, who went 3 for 5. "You work out and throw the ball all summer, but it's a whole lot different when guys are coming at you. We had a couple of miscues, and we have things to work on." Read more: http://scores.espn.go.com/nfl/recap?gameId=310811024
