Nolan Arenado wanted no part of the Astros, but Christian Walker will be a solid addition once he actually signs.

Arenado was never fully comfortable with being dealt to the Astros and, sources say, does not want to rush into a trade decision.

The Astros ' pursuit of Nolan Arenado hit a serious snag Wednesday afternoon as the St. Louis Cardinals third baseman refused to waive his no-trade clause in a deal with Houston. But Arenado's current stance could become flexible in the coming weeks.