In baseball, the dugout is a team's bench and is located in foul territory between home plate and either first or third base. There are two dugouts, one for the home team and one for the visiting team
Cincinnati Reds' dugout, 1991
Action in 1905 at West Side Park, Chicago. Ground-level bench in background.
The dugout of the Detroit Tigers in Comerica Park is located on the third base side.
In baseball, the bullpen is the area where relief pitchers warm up before entering a game. A team's roster of relief pitchers is also metonymically referred to as "the bullpen". These pitchers usually
Dugout (baseball)
…faces sunlight in the late innings. At Fenway, the third-base dugout faces the sun for part of a day game, while the first-base dugout remains shaded. Bullpen Technical area…
During pregame warmup the starting pitcher will loosen up in the bullpen. Chris Young of the San Diego Padres warms up in the former bullpen location at Wrigley Field prior to a game. This was an example of a bullpen located in foul territory on the playing field.
While the game is in progress, a relief pitcher warms up in the bullpen. Here Aaron Fultz and Rafael Betancourt warm up in the Cleveland Indians' bullpen behind the Progressive Field fence.