You will need to report on the event, and pull in the captains that way:
  1. Go to Data Management > select Reports
  2. Click the Report Writer tab
  3. Click Create a New Report
  4. Choose TeamRaiser from the report selection dropdown menu
  5. Mark Registrations from the available reports and click next
  6. Add desired fields and columns
  7. Skip to step 5: Configure Filters
  8. Click Edit next to the Event filter and choose your TeamRaiser
  9. Click Save this filter
  10. Click edit next to Registration from the dropdown menu, change it to Team
  11. Choose the correct team
  12. Click Apply
  13. Click Save this filter button
  14. Click Next
  15. Type the report name in the report label
  16. Click Next
  17. Click Run Report
When the report is finished running and you are viewing the online results, you will see an icon of a thumbs up that says "Add to Group" when highlighted. Click this icon and choose TeamRaiser Participants and click Next. You can either create a new group, or add these results to an existing group.