The following are thebaseball events of the year1875 throughout the world.

• National Association:Boston Base Ball Club

• Boston Red Stockings pitcherAl Spalding has a record of 54–5 and leads the NA in wins. His 570.2 innings pitched ranks second in the league. He has 75 strikeouts, a 1.59 earned run average, and a 136 ERA+. At the plate, he has a .312 batting average and a 134 OPS+.^[1][2]
• Boston Red Stockings first basemanCalvin McVey leads the NA with 87 runs batted in and a .873 OPS. His 138 hits and 192 OPS+ both rank second in the league. He has a .355 batting average and 89 runs scored.^[3][4]

• May 3 – TheHartfords are caught using an illegal bat which had been whittled nearly flat on one side and painted black to conceal the altering. The bat is thrown out and Hartford goes on to win the game.
• May 5 –National of Washington gives up 20+ runs for the 5th consecutive game.
• May 11 – TheRed Stockings of St. Louis fall to theChicagos 1–0, the lowest scoring game ever at the time.
• May 21 – Only 10 days after it happened for the first time, the NA sees its second 1–0 game asCandy Cummings ofHartford outduelsBobby Mathews ofMutual.
• May 22 –Pud Galvin makes his debut with theSt. Louis Club. Galvin will only pitch in 8 games for St. Louis and will not be seen in the major leagues again until 1879.
• June 11 –George Hall of thePhiladelphia Athletics, who will finish 2nd in the league with 4, homers in consecutive at-bats.

• July 20 –Harry Wright learns thatAlbert Spalding,Deacon White,Ross Barnes andCal McVey will jump toChicago for the 1876 season. TheChicago Tribune reports that Wright will return toCincinnati to start a new team.
• July 21 –Joe Start ofMutual hits 3 home runs and a triple in a Mutuals victory.
• July 28 –Joe Borden ofPhiladelphia pitched professional baseball's first no-hitter in defeatingChicago 4–0.
• September 6 – TheBostons win their 4th pennant in a row roughly 6 weeks sooner than they had in the previous 3 seasons. Boston clinches with 16 games left to play in the schedule.
• September 11 – The first professional women's game is played inSpringfield, Illinois on a half-sized field. The "Blondes" defeat the "Brunettes" 42–38.
• September 24 –George Gage, President of theChicago Base Ball Club, passes away after suffering a stroke.William Hulbert will take over the team and drive the final nail in the NA's coffin by starting theNational League during the off-season.
• September 25 –Paul Hines commits 10 errors at 2nd base forChicago in a loss.

• October 10 – At a meeting ofChicago Base Ball Club stockholders,William Hulbert uses a proxy from the widow of the deceasedGeorge Gage to declare himself President of the team. He namesAlbert Spalding as Secretary.
• October 30 –Boston defeatsHartford 7–4 in what proves to be the final game in the history of the NA. The Bostons claim the last 4 pennants in increasingly dominating fashion after theAthletics win the inaugural flag in 1871.

• 1875 –Bill Magee^[a]
• January 7 –Kitty Bransfield
• January 20 –C. I. Taylor
• January 20 –Ernie Courtney
• January 24 –Bunk Congalton
• February 1 –Billy Sullivan
• February 18 –Walter Thornton
• February 21 –Luther Taylor
• February 25 –Johnny Kling^[b]
• February 28 –George Gillpatrick
• March 3-John Kerin
• March 14 –Wilbur Murdoch
• March 28 –Jimmy Barrett
• March 28 –Harry Gleason
• April 2 –Ed Siever^[c]
• April 11 –Ossee Schreckengost
• April 12 –Joe Corbett
• April 13 –Kid Elberfeld
• May 29 –Dave Fultz
• June 25 –Bill Phyle
• August 6 –Brownie Foreman
• August 21 –Frank Isbell
• August 31 –Eddie Plank
• September 4 –Jack Gilbert
• November 25 –Freddy Parent
• November 30 –Myron Grimshaw
• December 2 –Mike Kelley
• December 4 –Joe Corbett
• December 17 –Jim McHale

• February 14 –Charlie Hodes, 26?, catcher/utility player from 1871 to 1874.
• July 22 –Eb Smith, 28, umpire for one game during the 1872 National Association season.

• 1875 season at Baseball-Reference.com
• Charlton's Baseball Chronology at BaseballLibrary.com
• Retrosheet.org

• 1875 in baseball

• Articles with short description
• Short description is different from Wikidata
• Use mdy dates from November 2013
• Short description matches Wikidata