Ronaldo José Hernández (born November 11, 1997) is a Colombian professional baseball catcher in the New York Yankees organization.

He is currently considered a phantom ballplayer, having spent multiple stints on the active roster of the Boston Red Sox without making an appearance in a Major League Baseball (MLB) game.

[9] On February 17, 2021, the Rays traded Hernández and Nick Sogard to the Boston Red Sox in exchange for Chris Mazza and Jeffrey Springs.

[12] The Red Sox again added Hernández to their major-league roster for one game, on August 1, following the trade of Vázquez and prior to catcher Reese McGuire joining the team.

[13] Hernández spending time on Boston's active roster without yet appearing in a major-league game made him an example of a phantom ballplayer.