[qwerty49]

To your question, the 1973 Mets were 58-70 on May 22, they finished 24-9 to go 82-79, beat the Reds in the NLCS, then lost the WS to the A's. Like the Giants, they had terrific pitching; Seaver, Koosman, Matlack, George Stone (12-3, 2.80 ERA) and closer Tug McGraw. Mets had a 3.26 ERA, 3rd best in the NL. And like the 2024 Giants, they were a terrible hitting team, between 8th and 12th (in a 12 team league) in BA, OBP, SLG, OPS. In fact, the only category they led the league was Caught Stealing...like the Giants. They were 11th in stolen bases.

The Astros were 15-30 on May 24, 2005. They finished 89-73, won the NLDS over the Braves, the NLCS over the Cardinals and lost the WS to the White Sox.

Closer to home, the 2008 Dodgers were 46-49 at the ASB, finished 84-78 (finished first in the NL West, beat the Cubs in the NLDS, lost the NLCS to the Phillies)

Separately, not sub-.500, but on August 11, 1951, the Giants were 13 games behind the Dodgers, then won 16 in a row -- every single win was by three or fewer runs -- after which they were five back. 

https://www.baseball-reference.com/teams...ores.shtml

At the end of the season, they won 12 of 13 to tie the Dodgers, then took 2 of 3 (3-1, 0-10, 5-4), culminating in the Shot Heard Round the World.

https://www.baseball-reference.com/boxes...0030.shtml

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Appreciate the input, Mick.  Sorry I wasn't more precise.  I really meant to ask if any team had finished the regular season under .500 and still gone on to the playoffs.....

[qwerty49]

To your question, the 1973 Mets were 58-70 on May 22, they finished 24-9 to go 82-79, beat the Reds in the NLCS, then lost the WS to the A's. Like the Giants, they had terrific pitching; Seaver, Koosman, Matlack, George Stone (12-3, 2.80 ERA) and closer Tug McGraw. Mets had a 3.26 ERA, 3rd best in the NL. And like the 2024 Giants, they were a terrible hitting team, between 8th and 12th (in a 12 team league) in BA, OBP, SLG, OPS. In fact, the only category they led the league was Caught Stealing...like the Giants. They were 11th in stolen bases.

The Astros were 15-30 on May 24, 2005. They finished 89-73, won the NLDS over the Braves, the NLCS over the Cardinals and lost the WS to the White Sox.

Closer to home, the 2008 Dodgers were 46-49 at the ASB, finished 84-78 (finished first in the NL West, beat the Cubs in the NLDS, lost the NLCS to the Phillies)

Separately, not sub-.500, but on August 11, 1951, the Giants were 13 games behind the Dodgers, then won 16 in a row -- every single win was by three or fewer runs -- after which they were five back. 

https://www.baseball-reference.com/teams...ores.shtml

At the end of the season, they won 12 of 13 to tie the Dodgers, then took 2 of 3 (3-1, 0-10, 5-4), culminating in the Shot Heard Round the World.

https://www.baseball-reference.com/boxes...0030.shtml

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Appreciate the input, Mick.  Sorry I wasn't more precise.  I really meant to ask if any team had finished the regular season under .500 and still gone on to the playoffs.....