Best case scenario: McCarthy manages to turn him into a John Kuhn starter kit.
Worst case scenario: He's a final cut when Olonilua, Ralston, McKeon, or PTBNL make him redundant.
Likely scenario: He's this season's Corey Clement...insurance that is good on ST.

In any case, he doesn't move the needle much...and that's fine at this point of free agency.