Following some of your favorite teams and leagues will ensure your Home Feed has all the great content you've come to expect from The Athletic. On the website, click the icon in the upper left corner, then click Manage Feed (theathletic.com/manage-teams). You can select from Teams, Leagues, and Authors, and use the search box to find your selections.
On the app, tap the button in the top left corner, and then Edit to manage your current selections. While in Edit mode, you can rearrange the ordering of the individual feeds at the top of the app. You can also tap the + icon, to follow even more teams, leagues, and authors.
To view the stories for only a particular team/city/league/author on The Athletic app, open the application, tap the respective icon at the top of your Home Feed.