NFL: San Diego at Washington

Is there something I'm missing with this line ? San Diego is only giving 3. Granted, San Diego's defense can be considered a little below average, they don't fail to put up at least 20 points per game, usually upwards to about 27 to 30. LT has proven to be the center of the San Diego offense, and Washington is still having problems with their offense. Their defense is faultering also.

Granted my analysis is quite cut and dry, and not too in depth, I've watched both teams play, and it seems as though San Diego is the MUCH better team.

Any thoughts ? Where do I go wrong here.