Now that the Cardinals have officially clinched a postseason spot, it is a good time to go over the Cardinals’ postseason eligibility list and give you a primer on the MLB postseason eligibility rules. Since the rule change in 2014, postseason eligibility is more wide open now than ever before. In this article, I will give you the Cardinals’ postseason eligibility list and explain how I arrived at it by citing the rules. In additional articles later on, I will outline how the rules have changed from their former strictness and explain how teams exploited what were believed to be loopholes in the rules and used various gambits to expand their potential playoff pool.