Dergi

other reserves; the need for late inning pinch-hitters (usually in the pitcher's spot) is reduced by the
DH.
Other personnel
Relief pitchers warming up, overseen by a bullpen coach. A manager will often have both a righthanded
and a left-handed reliever warm up to maximize strategic options.
The manager, or head coach of a team, oversees the team's major strategic decisions, such as
establishing the starting rotation, setting the lineup, or batting order, before each game, and making
substitutions during games—in particular, bringing in relief pitchers. Managers are typically assisted
by two or more coaches; they may have specialized responsibilities, such as working with players on
hitting, fielding, pitching, or strength and conditioning. At most levels of organized play, two coaches
are stationed on the field when the team is at bat: the first base coach and third base coach,
occupying designated coaches' boxes just outside the foul lines, assist in the direction of baserunners
when the ball is in play, and relay tactical signals from the manager to batters and runners during
pauses in play. In contrast to many other team sports, baseball managers and coaches generally wear
their team's uniforms; coaches must be in uniform in order to be allowed on the playing field during
a game.
Strategy and tactics
Many of the pre-game and in-game strategic decisions in baseball revolve around a fundamental
fact: in general, right-handed batters tend to be more successful against left-handed pitchers and, to
an even greater degree, left-handed batters tend to be more successful against right-handed
pitchers. A manager with several left-handed batters in the regular lineup who knows the team will
be facing a left-handed starting pitcher may respond by starting one or more of the right-handed
backups on the team's roster. During the late innings of a game, as relief pitchers and pinch hitters
are brought in, the opposing managers will often go back and forth trying to create favorable
matchups with their substitutions: the manager of the fielding team trying to arrange same-handed
pitcher-batter matchups, the manager of the batting team trying to arrange opposite-handed
matchups. With a team that has the lead in the late innings, a manager may remove a starting
position player—especially one whose turn at bat is not likely to come up again—for a more skillful
fielder.