The bullpen catcher is a member of a baseball team's staff. The individual, often a former professional player, warms up relief pitchers during baseball games and starting pitchers prior to the start of games.
Notable bullpen catchers include Rudy Arias, Scott Cursi, Josh Frasier, Jesús Tiamo, Jason Phillips, Román Rodríguez, Rob Flippo, Jamie Pogue, Tom Gregorio, Steve Soliz, Jeff Motuzas, Mark Salas, Cody Clark, Mark Merila, Dave Racaniello, and Mark Reed.
References
Bullpen catcher Wikipedia(Text) CC BY-SA