From your example, you want the Team 1 average just above the Team 2 average. That's easy to set up with most data in FileMaker. Side by side is also possible, but takes a lot more work to set up.
Assuming the the data to be summarized is in separate records for each data item, you can define a summary field that computes a total, an average or a number of other aggregate values are possible.
Put a sub summary part on your layout, "when sorted by" Team.
Put your summary fields in this sub summary part and then make sure that you sort your records by Team.
If you only want the totals, not the individual records, delete the body part from your layout.
If you need to define a calculation field that computes a value from the summary sub totals, make sure to use the getSummary function to access the sub totals. If you just refer to the summary field in your calculation, you get the grand total instead of the sub total.