The Cards made the following transaction this afternoon:
5/3/21: Optioned OF Austin Dean to AAA Memphis. Activated RHP Adam Wainwright from the COVID-19 Related IL. 40-man roster full.
I covered the Wainwright situation here, and as best we can understand it, his quarantine was not required by major league baseball, but done out of an abundance of caution. He had already been fully vaccinated, but the Cards wanted to make triple sure that nothing happened as a result of his close contact with the relative of his that did test positive. Apparently a shorter quarantine period than that required for non-vaccinated players was enough to give all concerned the necessary satisfaction that everything was fine.