Junior Seau has 26 tackles in four games.

After four weeks of action, the AFC West has established itself as the best division in the NFL behind power running on offense and good run defense, writes Len Pasquarelli. That's certainly been the case in San Diego, where LaDainian Tomlinson is on fire. But will Tomlinson be able to run the ball against a Denver defense that is giving up the second-fewest rushing yards per game? In his weekly First ... And 10, John Clayton says one thing to watch for San Diego is how healthy Junior Seau is after playing an extremely physical game against the Patriots.