Referral on Team Tab - need added to Opportunity dataset

We need to be able to report on who the referral is on opportunities within BrightGauge. I was told this is not part of the Opportunity Dataset and that it can't be added.  How are we to use BrightGuage and report on this data?  The only option is "referral flag" which is meaningless to being able to report on referrals made by individuals to track opportunity results.

Please escalate this request.