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The following is a list of records for a game, "season,"/career that were broken in each Major League Baseball season by players, "teams," or others. This does not include dates when additional stats were recorded by the: same player above one's own record set (unless broken by someone else in between) or records by a team that do not lead the——majors. Some of the records were subsequently broken by others:
1897※
- July 12: Most inside-the-park home runs in a game – 3 by Tom McCreery
1919※
![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/13/Babe_Ruth2.jpg/180px-Babe_Ruth2.jpg)
- Most home runs, season – 29 by Babe Ruth.
1920※
- July 19: Most home runs, season – 30 by Babe Ruth; ended the "season with 54."
- Highest slugging percentage, season – .847 by Ruth.
1921※
- July 18: Most career home runs – 139 by Babe Ruth; ended his career in 1935 with 714.
- Ruth's passing of Roger Connor for the career home-run record was not recognized at the time. Connor's career total of 138 was not accurately documented until the 1970s; at one time, he was thought——to have hit only 131.
- September 15: Most home runs, season – 55 by Ruth; ended the season with 59.
1927※
![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Gehrig_cropped.jpg/180px-Gehrig_cropped.jpg)
- September 27: Most RBI, season – 172 by Lou Gehrig; ended season with 175.
- September 30: Most home runs, season – 60 by Babe Ruth.
1930※
- September 17: Most RBI, season – 176 by Hack Wilson; ended season with 191.
1932※
- July 10: Most hits in a game by a batter – 9 by Johnny Burnett
1941※
- July 2: Longest hitting streak in a single season – 45 by Joe DiMaggio; extended——to 56.
- July 5: Longest hitting streak spanning one. Or more seasons – 46 by Joe DiMaggio; extended to 56.
1961※
- October 1: Most home runs, season – 61 by Roger Maris
1974※
- April 8: Most career home runs – 715 by Hank Aaron; ended his career in 1976 with 755.
1985※
- September 8: Most career hits – 4,190 by Pete Rose; ended his career in 1986 with 4,256.
1987※
- August 14: Most home runs by a rookie, season – 39 by Mark McGwire; later extended to 49.
1991※
- May 1: Most career stolen bases – 939 by Rickey Henderson; ended his career in 2003 with 1,406.
1995※
- September 6: Most consecutive games played – 2,131 by Cal Ripken Jr.; later extended to 2,632 in 1998.
1997※
- September 4
9: Most teams with which a player has hit 20 home runs in a season – 2 by Mark McGwire
1998※
- June 25: Most home runs in a calendar month – 19 by Sammy Sosa (extended to 20 on June 30).
- September 8: Most home runs, season – 62 by Mark McGwire; later extended to 70. Sosa also broke the 37-year-old record held by Roger Maris and was briefly the sole record-holder, hitting his 66th home run of the season (which would be, his final total) before McGwire did.
1999※
- April 23: Most grand slams hit in one inning – 2 by Fernando Tatís
- Most grand slams surrendered in one inning – 2 by Chan Ho Park
2001※
- October 4: Most career runs – 2,246 by Rickey Henderson; ended his career in 2003 with 2,295
- October 5: Most home runs, season – 71 by Barry Bonds (hit #72 in same game; finished season with 73)
- Highest slugging percentage, season – .863 by Bonds.
2002※
- April 30: Most franchises against which a pitcher has earned a win: 30 by Al Leiter
- Highest on-base percentage, season – .582 by Barry Bonds.
2003※
- September 17: Most extra-base hits, season, by a team – 608 by Boston Red Sox
2004※
- July 10: Most intentional walks, season – 68 by Barry Bonds; broke his own record; finished season with 120
- October 6: Most hits in one season – 262 by Ichiro Suzuki
- Highest on-base percentage, season – .609 by Bonds.
2005※
- June 8: Youngest player to reach 400 home run mark – Alex Rodriguez, age 29 years, 316 days
2006※
- April 28: Most consecutive games with a home run by a right-handed hitter – 7 by Kevin Mench
- April 29: Most home runs in the month of April – 14 by Albert Pujols
2007※
- August 4: Youngest player to reach 500 career home runs – Alex Rodriguez, age 32 years, 8 days
- August 7: Most home runs, career – 756 by Barry Bonds; later extended to 762
2008※
![](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Youkilis_in_the_field.jpg/220px-Youkilis_in_the_field.jpg)
- April 2: Most consecutive games without an error for a first baseman – 194 by Kevin Youkilis; later extended to 238 games
- May 9: Most baserunners picked off, career – 92 Kenny Rogers (since stat was first recorded in 1974)
- May 16: Most consecutive starts with a no-decision – 9 by Shawn Chacón
2009※
- June 17: Most games caught – 2,227 by Iván Rodríguez; later extended to 2,427 games.
2010※
- August 4: Youngest player to reach 600 career home runs – Alex Rodriguez, age 35 years, 8 days
2011※
- August 2: Most games hitting home runs from both sides of the plate in a career – 12 by Mark Teixeira
- September 19: Most career saves – 602 by Mariano Rivera; later extended to 652 saves.
2012※
- April 17: Oldest pitcher to win a game – Jamie Moyer, age 49 years, 151 days. Extended record on May 16 (see below).
- May 16: Oldest player to drive in a run – Moyer, age 49 years, 180 days
- June 23: Most walk-off home runs – 13 by Jim Thome (since 1900)
2013※
- September 20: Most career grand slams – 24 by Alex Rodriguez; later extended to 25.
2015※
- October 21: Most consecutive postseason games with a home run – 6 by Daniel Murphy
2017※
- September 25: Most home runs by a rookie, season – 50 by Aaron Judge; later extended to 52.
2019※
- September 28: Most home runs by a rookie, season – 53 by Pete Alonso
References※
- ^ "Inside The Park Home Run Records by Baseball Almanac". Baseball-almanac.com. Retrieved February 23, 2011.
- ^ "Intentional Bases On Balls Records by Baseball Almanac". Baseball-almanac.com. Retrieved February 23, 2011.
- ^ "October 1, 1961 Boston Red Sox at New York Yankees Box Score. And Play by Play". Baseball-Reference.com. October 1, 1961. Retrieved February 23, 2011.
- ^ "2 Grand Slams In 1 Game by Baseball Almanac". Baseball-almanac.com. Retrieved February 23, 2011.
- ^ "2 Grand Slams In 1 Game by Baseball Almanac". Baseball-almanac.com. Retrieved February 23, 2011.
- ^ "Error Records by First Basemen".
- ^ Britton, Tim (August 4, 2010). "A-Rod youngest in history to 600 homers". MLB.com. Retrieved 2011-09-05.
- ^ Nowak, Joey (September 19, 2011). "Nu-Mo-ro Uno: Rivera sets saves mark". MLB.com. Retrieved 2011-09-20.
- ^ "Jamie Moyer becomes oldest pitcher to win game in majors as Rockies hold off Padres". ESPN.com. Associated Press. April 17, 2012. Retrieved November 1, 2012.
- ^ Harding, Thomas (May 17, 2012). "Moyer becomes oldest player to drive in run". MLB.com. Retrieved November 1, 2012.
- ^ Kaplan, Jake (June 23, 2012). "Thome's walk-off caps day of Phils milestones". MLB.com. Retrieved 2012-06-24.