The St. Louis Cardinals look like they are about to undertake a rebuild which gives the SF Giants a great opportunity to make a trade with them. They could potentially kill two birds with one stone in a hypothetical trade with St. Louis.
With new leadership in the front office, it seems likely that a rebuild is imminent for St. Louis. The results have not been there on the field and attendance has dropped. Plus, the team has pricey contracts for veterans like Sonny Gray and Nolan Arenado that they would like to get off the books.