He would absolutely be an upgrade.
The Titans are still having trouble with their offensive line. They have been shuffling it around this entire week with Andy Levitre being pushed to the second team. They need help on the line, and Paul Kuharsky says the Titans are monitoring what is going on with free agent guard Evan Mathis. (That link takes you to the ESPN homepage. Kuharsky's comments are on the right-hand side under the "NOW" heading)
Here is what Kuharsky said there:
The Titans are monitoring what's going on with free-agent guard Evan Mathis, source tells me.