The 1887 major league baseball season began on April 16, 1887. The regular season ended on October 10, with the Detroit Wolverines and the St. Louis Browns as regular season champions of the National League and American Association, respectively. The postseason began with Game 1 of the fourth World's Championship Series on October 10 and ended with Game 15 on October 26, in what was a best-of-fifteen-playoff, played across 10 cities.The Wolverines defeated the Browns, ten games to five (and clinching on Game 11), capturing their first World's Championship Series.

The Louisville Colonels set a Major League record which still stands for the most base on balls for a team in a game, with 19 against the Cleveland Blues on 21 September.

Over the offseason, the National League's Kansas City Cowboys folded, and saw them replaced by the American Association's Pittsburgh Alleghenys. In place of the Alleghenys leaving the AA for the NL, the Cleveland Blues were enfranchised. Meanwhile, the St. Louis Maroons relocated to Indianapolis, Indiana as the Indianapolis Hoosiers.

The color line is drawn

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 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 , breaking the color line. The process of integration would then last for another 12 years until , when the last major league team, the Boston Red Sox integrated by calling up Pumpsie Green.

Schedule

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 .

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. The 1887 World's Championship Series took place between October 10 and October 26.

Rule changes The 1887 season saw many radical changes which affected the game, as well as unity on rules by the American Association and National League. The following rule changes were made: The pitcher's box was reduced to 4 feet by feet. 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. The choice of who hits and pitches in each half of the inning is given to home team captain. Five balls became a base on balls, down from six in the AA and seven in the NL. Four "called strikes" were adopted for this season only, up from three. 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 ). In the National League the batter was awarded first base when hit by a pitch. The change was already implemented by the American Association in 1884. Home plate was to be made of rubber only - dropping the marble type and was to be 12 inches square. The pitcher must now keep his back foot on the rear line of the pitcher's box ( feet from middle of home plate). Coaches were recognized by the rules for the first time ever. First and third base were repositioned to be entirely in fair territory. The reserve role was expanded so clubs controlled all 14 players on the roster (expanded from 12).

Teams LeagueTeamCityBallparkCapacityManagerBaltimore OriolesOxford, MarylandOriole Park5,000Brooklyn GraysBrooklyn, New YorkWashington Park3,000Cincinnati Red StockingsCincinnati, OhioAmerican Park3,000Cleveland BluesCleveland, OhioNational League ParkUnknownLouisville ColonelsLouisville, KentuckyEclipse Park5,860New York MetropolitansSt. George, New YorkSt. George Grounds5,100Philadelphia AthleticsPhiladelphia, PennsylvaniaJefferson Street Grounds15,000St. Louis BrownsSt. Louis, MissouriSportsman's Park3,000Boston BeaneatersBoston, MassachusettsSouth End Grounds3,000Chicago White StockingsChicago, IllinoisWest Side Park6,000Detroit WolverinesDetroit, MichiganRecreation Park (Detroit)UnknownIndianapolis HoosiersIndianapolis, IndianaSeventh Street ParkUnknownNew York GiantsNew York, New YorkPolo Grounds20,709Philadelphia QuakersPhiladelphia, PennsylvaniaPhiladelphia Base Ball Grounds12,500Pittsburgh AlleghenysAllegheny, PennsylvaniaRecreation Park (Pittsburgh)17,000Washington NationalsWashington, D.C.Swampoodle Grounds6,000

Neutral site and Sunday games Two teams played in two neutral site games in which they were treated as the home team. Meanwhile, blue laws restricted Sunday activities in several localities, causing several teams of the American Association (which was informally referred to as the "Beer & Whiskey League" due to its openness on alcohol, compared to the National League) to play at ballparks in a different locality. TeamCityBallparkCapacityGames playedTypeBrooklyn GraysRidgewood, New YorkRidgewood Park10,00015SundayCleveland BluesCleveland, OhioCedar Avenue Driving ParkUnknown1SundayNew York MetropolitansWeehawken, New JerseyMonitor GroundsUnknown1SundayBrooklyn, New YorkWashington Park3,0001Neutral siteWashington NationalsWorcester, MassachusettsAgricultural County Fair GroundsUnknown1Neutral site

Standings

American Association

National League

Tie games 30 tie games (14 in AA, 16 in NL), which are not factored into winning percentage or games behind (and were often replayed again), occurred throughout the season.

American Association Baltimore Orioles, 6 Brooklyn Grays, 4 Cincinnati Red Stockings, 1 Cleveland Blues, 2 Louisville Colonels, 3 New York Metropolitans, 5 Philadelphia Athletics, 4 St. Louis Browns, 3

National League Boston Beaneaters, 6 Chicago White Stockings, 6 Detroit Wolverines, 3 Indianapolis Hoosiers, 1 New York Giants, 6 Philadelphia Quakers, 5 Pittsburgh Alleghenys, 1 Washington Nationals, 4

Postseason Bracket

*Denotes walk-off†Denotes eighth win by Detroit, clinching series

Managerial changes Off-season TeamFormer ManagerNew ManagerBoston BeaneatersJohn MorrillKing KellyCincinnati Red StockingsOllie CaylorGus SchmelzIndianapolis HoosiersGus SchmelzWatch BurnhamKansas City CowboysDave RoweTeam foldedLouisville ColonelsJim HartKick KellyPhiladelphia AthleticsBill SharsigFrank Bancroft

In-season TeamFormer ManagerNew ManagerBoston BeaneatersKing KellyJohn MorrillIndianapolis HoosiersWatch BurnhamFred ThomasFred ThomasHorace FogelNew York MetropolitansBob FergusonDave OrrDave OrrOllie CaylorPhiladelphia AthleticsFrank BancroftCharlie Mason

League leaders 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." This results in ambiguity for some players' season and career hits totals, notably with Cap Anson. 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. The 1887 batting average and hits are included below, using contemporary data on Baseball Reference.

American Association

+ Hitting leaders Stat Player Total AVG Tip O'Neill1 (STL) .435 AVG(1887) Tip O'Neill (STL) .485 OPS Tip O'Neill (STL) 1.180 HR Tip O'Neill1 (STL) 14 RBI Tip O'Neill1 (STL) 123 R Tip O'Neill (STL) 167 H Tip O'Neill (STL) 225 H(1887) Pete Browning (LOU)Tip O'Neill (STL) 275 SB Hugh Nicol2 (CIN) 138 1 American Association Triple Crown batting winner 2 All-time single-season stolen bases record

+ Pitching leaders Stat Player Total W Matt Kilroy (BAL) 46 L Al Mays (NYM) 34 ERA Elmer Smith (CIN) 2.94 K Toad Ramsey (LOU) 355 IP Matt Kilroy (BAL) 589.1 SV Adonis Terry (BRO) 3 WHIP Bob Caruthers (STL) 1.167

National League

+ Hitting leaders Stat Player Total AVG Sam Thompson (DET) .372 AVG(1887) Cap Anson (CHI) .421 OPS Dan Brouthers (DET) .988 HR Billy O'Brien (WAS) 19 RBI Sam Thompson (DET) 166 R Dan Brouthers (DET) 153 H Sam Thompson (DET) 203 H(1887) Dan Brouthers (DET) 240 SB John Montgomery Ward (NYG) 111

+ Pitching leaders Stat Player Total W John Clarkson (CHI) 35 L Egyptian Healy (IND) 29 ERA Dan Casey (PHI) 2.86 K John Clarkson (CHI) 237 IP John Clarkson (CHI) 523.0 SV Mark Baldwin (CHI)Frederick Fass (IND)Charlie Ferguson (PHI)Bob Pettit (CHI)Bill Stemmyer (BSN)Mike Tiernan (NYG)Larry Twitchell (DET)George Van Haltren (CHI) 1 WHIP Tim Keefe (NYG) 1.124

Milestones Batters Cycles

Tip O'Neill (STL): O'Neill hit for his first cycle and first in franchise history, on April 30 against the Cleveland Blues. O'Neill hit for his second cycle and second in franchise history, on May 7 against the Louisville Colonels. He is the first player to hit two cycles in a single season. Fred Carroll (PIT): Carroll hit for his first cycle and first in franchise history, on May 2 against the Detroit Wolverines. Candy Nelson (NYG/): Set a Major League record for starting three double plays as a part of the New York Metropolitans in a single game on June 9 against the Louisville Colonels. Dave Orr (NYM): Orr hit for his second cycle and second in franchise history, on August 10 against the Baltimore Orioles. Bid McPhee (CIN): McPhee hit for his first cycle and third in franchise history, and the second reverse cycle in major league history on August 26 against the Baltimore Orioles.

Other batting accomplishments King Kelly / Ezra Sutton (BSN): Set a Major League record for most runs scored in a game by two teammates, scoring six times each in a 28–14 win against the Pittsburgh Alleghenys on August 27.

Pitchers Bill George (NYG): Set a Major League record for most walks in a single game, walking 16 batters in a 12–11 loss to the Chicago White Stockings on May 30. George Van Haltren (CHI): Tied a Major League record for most walks in a single game, walking 16 batters in a 17–11 loss to the Boston Beaneaters on June 27.

Miscellaneous Philadelphia Quakers / Detroit Wolverines: Set a Major League record by scoring in 15 of 18 half-innings in a game on July 1. Jocko Milligan (PHA): Set a Major League record for most assists by a catcher in one inning against the Cincinnati Red Stockings, on July 26. New York Metropolitans: Became the first Major League team to use five pitchers in a single game in a 25–11 loss to the Louisville Colonels on August 31.

Venues