In a post that looked remarkably similar to one I was working on to be published tonight, I will humbly withdraw my post and just link to this FanGraphs post saying that Boston makes a whole lot of sense for both sides.
Money quote:
The Astros are unlikely to be ready for serious competition by the time Rodriguez’s contract is up, and if they are able to net a couple of prospects in need of some more seasoning without eating too much of his contract, that’s a big win for them.