I suppose I shouldn't call these posts mailbags because there's no mail involved, but whatever. Here are questions that my Twitter followers tweeted at me this morning:

Aza_Villalobos asked: Why can't Vincent Brown get the opportunity he deserves? All he does is make plays.

A couple of reasons. The most obvious one is seniority. Outside of first round draft picks, wide receivers typically have to work their way up the depth chart. Vincent Jackson wasn't a starter until his third year in the league. Malcom Floyd had to wait until his fifth season to be a starter. Heading into his second season, Vincent Brown has already begun climbing the ranks, but leapfrogging guys is almost impossible.

Another reason is that we have no idea how Vincent Brown would perform throughout a season against starting CBs. We see him tear up nickel CBs and second-stringers in preseason games, but would he be as impressive matched up against someone like Darrelle Revis? Probably not.

ksneaks asked: How many sacks do you think Ingram can pull off?

This is heavily dependent upon injuries, both to Melvin Ingram and the guys ahead of him on the depth chart. I could envision a scenario where he gets 10+ sacks, but I think it's highly unlikely. The most realistic number is probably closer to 7 or 8, assuming that he stays healthy.

__japhyryder__ asked: biggest concerns for this season (off/def)?

On the offensive side of the ball, I'm concerned about the offensive line. The Chargers have downgraded at LG from Kris Dielman to the unproven Tyronne Green. They've downgraded at LT from Marcus McNeill to either the inconsistent Jared Gaither (who couldn't cut it with the Raiders or Chiefs last season) or rookie UDFA Mike Harris. Mario Henderson is an experiment, and I honesty like what I've seen from Anthony Davis more.

On the defensive side of the ball, I'm actually quite confident. The only thing that worries me is the potential damage caused by injuries. An injury or two in the secondary could be devastating. I also am not crazy about the idea of Jonas Mouton being a starter if Takeo Spikes can't stay on the field.

johnpurcell21 asked: From our current roster who will get extended this yr.?

Here are the starters that are not currently under contract for next season:

• Antoine Cason
• Malcom Floyd
• Tyronne Green
• Quentin Jammer
• Nate Kaeding
• Shaun Phillips
• Louis Vasquez
• Mike Windt