1887 Major League Baseball season

On July 14, Chicago was to play an exhibition game against the Eastern League Newark team, who were set to play black players Moses Fleetwood Walker (who formerly played in the majors in 1884 three years prior) and George Stovey (who the New York Giants had their eyes on signing). With threats from Chicago to not play against Newark if Walker and Stovey played, they were substituted for the game. Between Chicago's financial threats to not play against teams with people of color and other minor league teams creating petitions to force teams to release players of color, Organized Baseball effectively set up the baseball color line.

The color line would remain firm for 60 years until the Brooklyn Dodgers called up Jackie Robinson in 1947, breaking the color line.^[3] The process of integration would then last for another 12 years until 1959, when the last major league team, the Boston Red Sox integrated by calling up Pumpsie Green.

The 1887 schedule consisted of 140 games for all American Association teams and 126 games for all National League, each of which had eight teams. Each AA team was scheduled to play 20 games against the other seven teams, while each NL team was scheduled to play 18 games against the other seven teams. Both the AA's 140-game format and NL's 126-game format were continued from their implementation the previous season. The NL would adopt the AA's format the following season, and each league would use this 140-game format until 1892.

American Association Opening Day took place on April 16 featuring all eight teams, while National League Opening Day took place on April 27, featuring four teams. The American Association would see its final day of the regular season on October 10 with four teams, while the National League would see its final day of the season on October 8, featuring all eight teams.^[4] The 1887 World's Championship Series took place between October 10 and October 26.

The 1887 season saw many radical changes which affected the game, as well as unity on rules by the American Association and National League.^[5] The following rule changes were made:

• The pitcher's box was reduced to 4 feet by 5+1⁄2 feet.^[6]
• The ability for batters to call for high and low pitches was abolished. In lieu of this, the strike zone was doubled in size, and established to be between the shoulders and knees.^[6][5]
• The choice of who hits and pitches in each half of the inning is given to home team captain.^[6]
• Five balls became a base on balls, down from six in the AA and seven in the NL.^[6][7]
• Four "called strikes" were adopted for this season only, up from three.^[6][7]
• Bases on balls were recorded as hits for this season only (a change which would dramatically increase players' batting averages). The batting average as calculated in 1887 is very similar to the modern on-base percentage (OBP) (the difference being that OBP uses total plate appearances as the denominator, which includes hit by pitches and sacrifice flies, the latter of which was not recorded and was implemented in 1894).^[6][7]
• In the National League the batter was awarded first base when hit by a pitch.^[6] The change was already implemented by the American Association in 1884.^[7]
• Home plate was to be made of rubber only - dropping the marble type and was to be 12 inches square.^[6]
• The pitcher must now keep his back foot on the rear line of the pitcher's box (55+1⁄2 feet from middle of home plate).^[6]
• Coaches were recognized by the rules for the first time ever.^[6]
• First and third base were repositioned to be entirely in fair territory.^[5]
• The reserve role was expanded so clubs controlled all 14 players on the roster (expanded from 12).^[8]

In 1887, bases on balls (walks) were counted as hits by the major leagues in existence at the time. This inflated batting averages, with 11 players batting .400 or better, and the experiment was abandoned the following season. Historical statistics for the season were later revised, such that "Bases on balls shall always be treated as neither a time at bat nor a hit for the batter."^[13] This results in ambiguity for some players' season and career hits totals, notably with Cap Anson.^[14] Anson was credited with a .421 average and the National League batting title in 1887; however, the recalculation of averages with walks excluded lowered his average to .347 and retroactively gave the batting title to Sam Thompson.^[14] The 1887 batting average and hits are included below, using contemporary data on Baseball Reference.^[15][16]

The Cleveland Blues join the American Association and play at National League Park in Cleveland, Ohio.

The 1887 season saw two teams relocate to new ballparks:

• The Indianapolis Hooisers, newly relocated from St. Louis, Missouri where they played as the St. Louis Maroons, leave Union Base Ball Park after playing their for three seasons, moving into Seventh Street Park where they would play for three seasons through 1889 before proceeding to fold.
• The Philadelphia Quakers leave Recreation Park (where they played for four seasons) and move to Philadelphia Base Ball Grounds, where they would go on to play for 52 seasons through 1938.

The first structure of the South End Grounds, home of the Boston Beaneaters, would see its last game on September 10, seeing a completely new structure built over the following offseason.

For various reasons, two teams would play home games at neutral sites:

• The Washington Nationals play a game in Worcester, Massachusetts against the Boston Beaneaters in a game rescheduled from a rainout in Washington, D.C. They play at the home of the former Worcester Worcesters at the Agricultural County Fair Grounds on August 17.^[25]
• The New York Metropolitans play a game at the home of the Brooklyn Grays in Brooklyn, New York at Washington Park on October 8.^[26]

Three teams of the American Association hosted Sunday games:

• The Brooklyn Grays played 15 games at Ridgewood Park in Ridgewood, New York on April 27, June 5, 12, 19, 26, July 24, 31, August 7, 14, September 4, 11, 18, 25, October 2 and 9.^[27]
• The Cleveland Blues played one game at Cedar Avenue Driving Park in Cleveland, Ohio on August 21.^[28]
• The New York Metropolitans played one game at Monitor Grounds in Weehawken, New Jersey on September 11.^[29]

• 1887 in baseball (Events, Births, Deaths)