The Biggest Boston Red Sox Blown Leads Of All Time

What is the biggest Boston Red Sox blown lead of all time?

The largest blown lead in Boston Red Sox history is 10 runs. The Red Sox were leading 10-0 in the top of the 7th inning against the Toronto Blue Jays on Jun 4, 1989, and ended up losing the game 11-13 in extra innings.

Biggest Boston Red Sox Collapses

	Date	Opponent	Largest Lead		Final Score
1	Sun, Jun 4, 1989	vs Toronto Blue Jays	10	10-0, Top 7th	11-13
2	Sat, Apr 21, 2012	vs New York Yankees	9	9-0, Top 6th	9-15
	Tue, Jun 30, 2009	@ Baltimore Orioles	9	10-1, Bot 7th	10-11
	Fri, Jun 26, 1987	@ New York Yankees	9	9-0, Bot 3rd	11-12
	Tue, Apr 18, 1950	vs New York Yankees	9	9-0, Top 6th	10-15
	Sun, Aug 2, 1936	@ Chicago White Sox	9	10-1, Bot 5th	11-12
7	Sun, Sep 2, 1956	vs Baltimore Orioles	8	8-0, Top 3rd	10-11
8	Fri, Jun 12, 2015	vs Toronto Blue Jays	7	8-1, Top 5th	10-13
	Sat, Jun 28, 2003	vs Florida Marlins	7	9-2, Top 8th	9-10
	Mon, May 3, 1999	@ Oakland Athletics	7	7-0, Bot 3rd	11-12
	Wed, Jun 4, 1997	@ Milwaukee Brewers	7	7-0, Bot 3rd	11-13
	Mon, Sep 28, 1987	@ New York Yankees	7	7-0, Bot 6th	7-9
	Mon, Jul 6, 1987	@ California Angels	7	7-0, Bot 7th	7-10
	Sun, Apr 10, 1983	@ Texas Rangers	7	7-0, Bot 3rd	7-9
	Tue, Sep 1, 1970	vs Detroit Tigers	7	8-1, Top 4th	9-10
	Thu, Jun 25, 1970	vs Baltimore Orioles	7	7-0, Top 6th	8-13
	Wed, Jul 31, 1940	@ Cleveland Indians	7	7-0, Bot 4th	11-12
	Sun, Jul 27, 1930	@ St. Louis Browns	7	9-2, Bot 8th	9-10
	Thu, Sep 27, 1928	@ Cleveland Indians	7	7-0, Bot 1st	10-14
	Wed, Sep 7, 1927	vs New York Yankees	7	8-1, Top 6th	10-12
	Sun, Jun 12, 1927	@ Detroit Tigers	7	8-1, Bot 4th	10-11
	Tue, Jul 8, 1924	vs St. Louis Browns	7	7-0, Top 3rd	7-8
	Wed, Jul 20, 1921	@ St. Louis Browns	7	7-0, Bot 4th	9-10
24	Fri, May 27, 2022	vs Baltimore Orioles	6	8-2, Top 7th	8-12
	Mon, Sep 6, 2021	vs Tampa Bay Rays	6	7-1, Top 4th	10-11
	Sat, Jun 22, 2019	vs Toronto Blue Jays	6	6-0, Top 4th	7-8
	Sat, Aug 25, 2012	vs Kansas City Royals	6	9-3, Top 7th	9-10
	Thu, Aug 23, 2012	vs Los Angeles Angels of Anaheim	6	6-0, Top 3rd	13-14
	Fri, Aug 13, 2010	@ Texas Rangers	6	8-2, Bot 4th	9-10
	Mon, Sep 21, 2009	@ Kansas City Royals	6	8-2, Bot 5th	9-12
	Sat, Aug 27, 2005	vs Detroit Tigers	6	6-0, Top 4th	8-12
	Sun, Jun 1, 2003	@ Toronto Blue Jays	6	6-0, Bot 3rd	8-11
	Thu, Jun 1, 2000	vs Kansas City Royals	6	8-2, Top 6th	11-13
	Tue, Jun 18, 1996	@ Cleveland Indians	6	6-0, Bot 2nd	7-9
	Thu, May 7, 1992	@ Chicago White Sox	6	6-0, Bot 2nd	6-7
	Wed, Aug 2, 1989	vs Baltimore Orioles	6	6-0, Top 6th	8-9
	Tue, Jun 19, 1984	vs Baltimore Orioles	6	7-1, Top 8th	7-9
	Fri, Aug 19, 1983	vs Toronto Blue Jays	6	6-0, Top 3rd	7-8
	Tue, Aug 25, 1981	@ California Angels	6	6-0, Bot 3rd	7-8
	Wed, Sep 24, 1980	@ Baltimore Orioles	6	7-1, Bot 3rd	9-12
	Tue, Jul 31, 1979	@ Cleveland Indians	6	10-4, Bot 7th	10-11
	Sun, Aug 15, 1976	@ Oakland Athletics	6	6-0, Bot 5th	7-8
	Sat, Apr 17, 1971	@ Detroit Tigers	6	7-1, Bot 3rd	9-10
	Sat, Aug 29, 1970	@ Chicago White Sox	6	7-1, Bot 6th	9-13
	Mon, Jun 22, 1970	vs Baltimore Orioles	6	6-0, Top 2nd	8-9
	Sat, Apr 30, 1966	vs California Angels	6	9-3, Top 8th	9-16
	Wed, Jul 25, 1956	@ Kansas City Athletics	6	6-0, Bot 7th	6-9
	Fri, May 28, 1954	vs New York Yankees	6	9-3, Top 6th	9-10
	Wed, Jun 29, 1949	vs New York Yankees	6	7-1, Top 5th	7-9
	Sat, Jun 4, 1949	@ Detroit Tigers	6	7-1, Bot 4th	9-10
	Wed, Aug 4, 1948	@ St. Louis Browns	6	6-0, Bot 1st	8-9
	Tue, May 18, 1948	@ Detroit Tigers	6	6-0, Bot 6th	7-10
	Wed, Sep 20, 1944	@ Cleveland Indians	6	6-0, Bot 2nd	10-11
	Thu, Aug 22, 1940	vs Detroit Tigers	6	8-2, Top 3rd	8-9
	Sun, Apr 26, 1936	vs New York Yankees	6	6-0, Top 2nd	9-12
	Thu, May 10, 1934	vs Cleveland Indians	6	6-0, Top 5th	10-11
	Wed, May 2, 1934	vs Philadelphia Athletics	6	6-0, Top 5th	11-12
	Mon, Jun 13, 1932	@ Chicago White Sox	6	6-0, Bot 6th	6-7
	Tue, Apr 26, 1927	vs Philadelphia Athletics	6	7-1, Top 6th	8-9
	Tue, Apr 14, 1925	@ Philadelphia Athletics	6	6-0, Bot 7th	8-9
	Tue, Oct 2, 1917	vs Washington Senators	6	6-0, Top 4th	7-9
	Fri, Jul 30, 1915	vs Detroit Tigers	6	6-0, Top 6th	6-7
	Sat, Jun 27, 1908	@ New York Highlanders	6	6-0, Bot 4th	6-7
	Mon, Apr 20, 1903	vs Philadelphia Athletics	6	6-0, Top 7th	7-10

What is the biggest 9th inning collapse in Boston Red Sox history?

The largest lead the Boston Red Sox have blown in the 9th inning is 5 runs, which they've done 5 times. The most recent 5 run blown lead in the 9th inning was on Jun 8, 1998, when the Red Sox were ahead 6-1 in the bottom of the 9th inning against the Atlanta Braves, and blew the lead and lost the game 6-7.

Biggest All Time Boston Red Sox Blown Leads

What is the biggest Boston Red Sox blown lead of all time?

Biggest Boston Red Sox Collapses

What is the biggest 9th inning collapse in Boston Red Sox history?