Where do pro pitchers warm up before a game?

Pitchers can do their initial warm-ups anywhere, usually some light throwing to warm up their arms in the outfield area. Then they can move into the bullpen where there is a mound and a catcher where the height of the mound and distance to the catcher are identical to the mound and catcher on the playing field. Starting pitchers may use the bullpen for their warm-ups during pre-game ceremonies on the field, then move onto the mound on the field immediately prior to the start of the game, and relief pitchers will use the bullpen prior to going into the game.