OK, so I've made my first post and already I have decided to go a little bit different direction. After reading HalosHeaven documentation on the order of appearances for the Angels, I decided to deviate from listing the draft players first, and stick closely to the order that he has them listed, per MLB records. I'll fill in the draftees and other members such as managers and coaches as we go along.
So, with that, Eli Grba is NOT the first to appear in a Major League game as an Angel. That honor goes to Eddie Yost, since the Halos were visitors in their very first game.