This article will show you how to create a new Team within League Management.
Instructions
Navigate to Activities and then select League Management:

Expand a League:

Select Access League Management (basketball) icon next to a session

Select the Teams tab:

Click on the Create New Team button:

Click on the Team Name box to create a team name:

Note:
The new team name will always default to A new team.
Configure additional options for the team:

Note:
The available columns may differ depending on how your league session is set up.
Roster: View and invite players to the roster
Coaches: Assign coaches to a team
Division: If you have created divisions for the league, assign those to individual teams
Home Location: Choose a home location for the team from the drop-down menu
Note:
The Home Location field may not be available until after a Coach is chosen.