A family of Microsoft relational database management systems designed for ease of use.
I think this should be a process of push rather than pull, Duane. The captain of a team will change over time, so a referencing table, MatchTeams say, should have columns for both. In the AfterUpdate event procedure of the control bound to the Team column the current value of the Captain column in the referenced Teams table would be assigned to a Captain column in the referencing table with:
Me.Captain = Me.cboTeam.Column(1)
It's analogous to the common example of a unit price of a product where both the Products table and OrderDetails table would have a UnitPrice column, in each case functionally determined by the table's key.