Violence can occur in the America

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

n sport of baseball

Baseball

Baseball is a bat-and-ball sport played between two teams of nine players each. The aim is to score runs by hitting a thrown ball with a bat and touching a series of four bases arranged at the corners of a ninety-foot diamond...

through many incidents including pitchers intentionally hitting a player with the ball (see hit by pitch

Hit by pitch

In baseball, hit by pitch , or hit batsman , is a batter or his equipment being hit in some part of his body by a pitch from the pitcher.-Official rule:...

), a grudge between a pitcher and a hitter, a rivalry between the two teams in the match up, or a play at a base thought of as unnecessarily rough. Any of these actions may result in the offensive player "charging the mound

Charging the mound

In baseball, charging the mound is when a batter assaults the pitcher, usually the result of being hit by a pitch or nearly being hit by a pitch. The first incidence of a professional charging of the mound has not been identified but the practice certainly dates back to the game's early days...

", or charging at the pitcher after the incident to provoke a fight. An escalated situation may also result in a bench-clearing brawl

Bench-clearing brawl

A bench-clearing brawl, sometimes known as a basebrawl or a rhubarb, is a form of ritualistic fighting that occurs in sports, most notably baseball and ice hockey, in which every player on both teams leave their dugouts, bullpens, or benches and charge the playing area in order to fight one...

, in which players from both teams leave their respective dugout

Dugout (baseball)

In baseball, the dugout is a team's bench area 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. In general, the dugout is occupied by all players not prescribed to be on the field at that...

s and bullpen

Bullpen

In baseball, the bullpen is the area where relief pitchers warm-up before entering a game. Depending on the ballpark, it may be situated in foul territory along the baselines or just beyond the outfield fence. Also, a team's roster of relief pitchers is metonymically referred to as "the bullpen"...

s to join the fight on the field. The act of hitting a batter with a pitch to provoke a fight is illegal in the sport, stated in the official Major League baseball rulebook, section 8.02: "The pitcher shall not intentionally pitch at the batter...If, in the umpire's judgment, such a violation occurs, the umpire may elect either to: Expel the pitcher, or the manager and the pitcher, from the game...To pitch at a batter's head is unsportsmanlike and highly dangerous. It should be and is — condemned by everybody. Umpires should act without hesitation in enforcement of this rule." The rulebook also condemns other violent acts in section 9.01: "Each umpire has authority to disqualify any player, coach, manager or substitute for objecting to decisions or for unsportsmanlike conduct or language, and to eject such disqualified person from the playing field. If an umpire disqualifies a player while a play is in progress, the disqualification shall not take effect until no further action is possible in that play."