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. (en)
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. (en)
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