The benefit is not in trading him but in having better players to replace him. If guys like Jenkins, Rodriguez, Gonzeles, Mendez or Rosario don't ultimately end up being better than him, whatever incremental improvements they get out of him will prove to be of little consolation. Same goes for Larnach. Larnach is far enough along in his career where he shouldn't be 15th on your team in WAR. Wallner is dangerously close to being in the same boat. Somebody got an oar?