another reason i could see it being DET...with all his problems, its not like lions were tearing it up record wise with either harrington or kitna... carr could very possibly be an upgrade at the position...though it may not seem like his MO (martz has had success with low pedigree QBs & re-treads like warner, bulger & kitna), he might view it as a challenge to turn his career around... it probably isn't martz's call, but his input could be weighed heavily as he is viewed as an offensive mastermind, & HC marinelli's fate could be partly tied up with how offense does (ie - one more awful year & no guarantee he retains his job)... this is obviously contingent on martz thinking carr would be an upgrade (i doubt he is twisted enough to put team in worse position for chance to position himself to look good later)... if martz did ressurect carr's career & a moribund offense at same time, & contribute to elevating the teams overall record & fortunes, it could increase his visibility for potential future HC consideration... maybe that it a little elaborate, & more direct way to look at it would just be to acknowledge that he could do that just by winning period, with kitna or carr... but it might be even more attention getting & noticeable with carr...