The St. Louis Cardinals are playing well, but it still is unclear what they will do at the trade deadline. The roster is built to sell with several players on expiring contracts, but that doesn't mean it's the only path they can take. Teams can buy, sell, do a little of both, or even stand pat at the deadline. Based on where the Cardinals are right now and given Chaim Bloom's comments about not wanting to deviate from the plan, it would seem that strictly buying is highly unlikely. However, the other three paths are possibilities. Here is a comprehensive look at which each strategy would look like and which one is ultimately the best. Which strategy will Cardinals choose? Aug 28, 2022; Boston, Massachusetts, USA; Chaim Bloom, Chief Baseball Officer of the Boston Red Sox on the field before the game between the Boston Red Sox and the Tampa Bay Rays at Fenway Park. Mandatory Credit: Winslow Townson-Imagn Images | Winslow Townson-Imagn Images Buy and sell This is a strategy Bloom has employed before.…