How do I setup tables for relationships?

I am trying to setup a new database for scheduling and reporting on a baseball league.  I assign umpires and am trying to figure out how exactly to set this up.  I have an umpires table with name, address info, etc.....

I then have a Game Master table that has the following:
Date
Start Time
Field
Umpire1
Umpire2


In a given week, an umpire may be assigned to several games and will most likely be listed as Umpire1 for several games and also as Umpire2 for others.


How do I, or do I need to, create the relationship between the tables for Name & Umpire.

Any suggestions or direction would greatly be appreciated as I am a real novice in setting this up.

League started already and I'm trying to play catch-up....


Thanks,


Joey