Danny Jansen has the opportunity to do something unique. He was recently traded from Toronto to Boston. On August 26, Toronto and Boston are set to resume a suspended game. When that game was suspended, Jansen was at bat for the Jays. He will likely be the catcher for Boston since the Red Sox player who was catching in that game was DFA'd to make room for Jansen.
So, he will likely be not only the first player to appear for both teams in the same game, but also the first player to both hit and catch in the same at bat.