This is where you can use Power Pivot to join your data.
Format your source data as tables, and use Power Query to load the data to the data model:
Table1:
Table2:
Add a third query to get all the distinct Team values, in a third table.
Teams:
Close and load all three queries: "Only Create Connection", and tick "Add this data to the Data Model".
Now in PowerPivot create a relationship between the tables, on field Team:
xlf_1279619.png
Now you can create your pivot reports from your Data Model tables. Add a slicer using field 'Team' from table 'Teams', and connected that slicer to both pivot tables.
See attached workbook for a worked example.
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