It’s quite clear what Peter Alonso needs to improve most. The New York Mets first base prospect can smash baseball well, but it’s picking them with his glove that could use some work.
We often fall into the trap of thinking first base is a position where you hide a bad defender. While often true, it’s also a position for great glove men. It’s rare you can find a guy who hits and plays a good first base. Guys like Keith Hernandez and John Olerud do not grow on trees.