The obvious trade candidate is Jansen, he's older, has less control remaining and is getting more expensive year by year. Kirk matches his offensive upside for less money - but don't kid yourself on the body thing. All catcher's bodies fail eventually, and his will fail faster than most because of it. Maybe it wont happen in his first 6-7 years, but no way he makes in past 30 in MLB without significantly altering his body unless he's a bowling ball unicorn.