Overview
Bases loaded describes the situation where runners occupy all three bases - first, second, and third - simultaneously. For the offense, it represents the maximum scoring opportunity; for the defense, the gravest threat. Bases-loaded situations carry the potential to transform a game's trajectory and rank among the most tension-filled moments for fans. With the bases loaded, a single swing can produce up to four runs via a grand slam, one of baseball's most dramatic plays. A walk-off grand slam - ending the game in an instant - is the ultimate clutch hit. Conversely, the bases-loaded scenario also favors the defense in one respect: force plays are available at every base, making double plays easier to execute. An intentional walk with the bases loaded (forcing in a run) is an extraordinarily rare tactic, conceding a run to face a more favorable matchup, and it invariably generates headlines when employed. The psychological pressure on a pitcher with the bases loaded is immense. With first base occupied, a walk or a hit batter forces in a run on the spot, and even a wild pitch, a passed ball, or a balk lets the runner on third come home. The escape route of pitching around a dangerous hitter is gone, and any mistake translates immediately into runs, which makes the task unlike pitching with the bases empty. A pitcher who escapes a bases-loaded jam without allowing a run draws praise and provides an enormous momentum boost to the team. In Japan the 'firefighter' label is reserved above all for relievers who enter with runners already stacked up and put the fire out.