Commish mode. Free Agent list, far right side drop down. Import player. When the pop-up comes up use his Baseball Reference website code, bauertr01 and 2021 as the year. He will come in as a FA. Select him and correct his birth year to make the correct age. Edit anything else you like too. When importing also select “keep years stats” in the checkbox.
If you need more info on importing real people see the manual.
