Sort out the left side of the Dodger infield
Justin Turner regressed defensively in 2019 by a good margin. He rated the worst at third base of any year in Dodger blue posting a DRS of -7 and a UZR/150 rating of -12.9. A shift across the diamond to first base should be in order for Turner who is in the last year of his contract. The most obvious addition would be Anthony Rendon who would take over third base for many seasons to come and provide a big boost defensively and offensively.
Then there is Corey Seager who is coming off a down season that many label as a returning from injury season. There is a chance that the 2019 version of Seager may be who he is going forward. The 2020 season will be a big year for Seager and could determine his future with the Dodgers depending on how he does. The Dodgers could shift Seager to third base if they acquire a shortstop such as Francisco Lindor.