Monty is a pretty good pitcher. He gives innings. He keeps opponents from scoring a lot. He takes the ball, every 5 days.
There might be 20-30 SP'ers better than him, but none are on the Sox.
The odds are much better for us to win, if he was on the mound, and if wins is what the game is all about, he's a damn good SP'ers for increasing the chances of winning.
If he were to join the Sox, sending Houck to the pen would turn our pen from about average to a clear top 10-14 pen, on paper. That would help all our SP'ers in getting the team more wins.
Just do it. The cost should not be too high, as it seems nobody is beating down the door to overpay him.