D6KStl - you just have to select two different people from the list*, they can be from any team. They can be two AL teams, two NL teams, or one of each.
*a player can only be selected twice. In this season, for example, 2018 Alex Bregman has been selected twice, so he is off the table. Any other Alex Bregman (if there is another year he led the league in doubles) would be available.