The term “everyday player” in baseball typically means a guy will start as often as possible. We know the everyday players on the New York Mets. Pete Alonso, Michael Conforto, Amed Rosario, and the list goes on.
In 2020, the team will have a different kind of everyday player on the roster. Jake Marisnick should start many games from the bench, but will undoubtedly find his way onto the field practically every day there’s a game.
Whether you want to refer to Marisnick as a fourth or fifth outfielder is up to you.