Mailbag: What's the Patriots' plan at left tackle?

If you have questions on the Patriots, NFL, or want to gripe about past answers, email cmason@masslive.com or tweet @bychrismason. Now let's get to this week's questions! What is the backup plan if both Chukwuma Okorafor and Caedan Wallace are unable to make the switch to left tackle? In case you're not up to speed, Okorafor and Wallace are the top two options on the depth chart, and both have spent (at least) the last five years playing right tackle, Okorafor with the Steelers and Wallace at Penn State.