Some of them will come from Mark DeRosa, but I would focus on the main insiders. Jon Morosi is one of those insiders. While this is more speculation, he offered what he called an intriguing trade scenario for the Astros.
The Astros have the depth in the rotation to win in the regular season. However, behind Dallas Keuchel and Lance McCullers, do they have a third top pitcher to win in the playoffs? If the answer for you is yes, then you will be opposed to the Astros making a trade.