Let's dive into the keys to the game in this "Four Downs" preview of the 49ers exhibition contest, presented by SunPower. It's a crowded room, and not everyone can make the roster. There isn't much to say here, but I'll provide three names to watch: Quinton Dial, Chris Jones and Sen'Derrick Marks. Those three may be battling for just one roster spot. If Ronald Blair III plays, he's another player I'd keep an eye on.
1st Down: What is the position group to watch?
@Joe_Fann: Defensive Line
Four Downs: Expectations for the Preseason Finale vs. Chargers
