Once we got Kepler then Clemens never fit unless we were going to get him 3B at bats against RHP. There is an argument that trading Bohm and letting Clemens and Wilson and Sosa split 3B in some way would have been a good thing, but we chose not to because the team is in win-now mode and Bohm probably was only going to net prospects (and not somebody like Luzardo).
We saw enough of Clemens to know he did some things well, but not enough of them consistently to be a full time player or even the strong half of a platoon.