As you’ve surely heard, the Cardinals made one of the most impactful deals of the off-season a few weeks ago when they acquired third baseman Nolan Arenado from the Rockies. The move is clearly a good trade for the Cardinals, as they acquired one of the league’s top players without subtracting significantly from either their Major League roster or the top of their prospect list. They somehow did so without adding to their payroll for 2021. Nothing that happens in 2021 will make that a bad deal. Having said that, there are some concerns about Arenado. After a tremendous first seven years to his career, he struggled mightily in 2020.