Harbs had a little slip in his last press conference. When asked about the LG competition he said "Hey, if they're both doing great and they're not separating because they're both doing great, that's really great too."
He doesn't mention exactly who both are, but you know Powers is one of those guys. It would seem that one of the two big country's is not even being considered for the LG spot. OR they're certain they are trading/cutting Powers and both corresponds to the two big country's.
EDIT: Later in the presser he goes on to say that Tyre has been really good, he certainly more of a guard than a tackle, but he gives him credit that he can get you out of a jam if need be and that he is undoubtedly not out of the LG competition. So that means Tyre is one of the "both" mentioned above.