Let’s say it’s in the late innings, and the manager wants to make a pitching change. So he announces that Joe Blow will be coming out of the bullpen in relief. The opposing manager doesn’t like the Joe Blow vs. his guy matchup, so he names Jack Schmoe as a pinch-hitter. The first manager doesn’t like THAT matchup, so he names Jeff Doe as his relief pitcher.
So in this case, Joe Blow was announced, but never touched the ball.
Does he get credited with an appearance?
What if this was Joe’s first time in the big leagues, and he never gets announced again, and gets sent back to the minors at the end of the season, and never gets called up again? Does he still get credited as appearing in a game in the Baseball Encyclopedia (or whatever it’s called)?