I wrote my own VB-client do do this, the data comes from a XML-file.
But you can also do it with the standard client - quick and dirty.
1.) Create your template. For every player and the teamname, create a dynamc text field with a unique name. E.g. Teamname, Player1, Player2, .... (If you want, separate for number and additional info)
2.) Put the template into CasparCG template folder.
3.) Put this template in standard Clients rundown and define all the fieldnames from the template. When you have finished, copy this, so you have two idetitical pre-defined templöates. You can change the properties e.g. to Team 1 and Team 2
Copy and paste the teams lineup to the fields....
Maybe you can send a example graphics .....