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
Brett Wisely is, for me, the long term Giants answer at shortstop. I can see why they maybe didn't think so out of the gate. He's short (only 5'9"), and I think they think he would be a better 2B, and maybe he couldn't hit too well. Buuuuuut...he is hitting .285/.320/.431/.751 and he is fielding like crazy...he has one error at shortstop in 29 games, and his range factor is almost a full chance per game better than MLB average at 4.62....Not Ozzie Smith level, but about the same as Cal Ripken, who earned a few gold gloves...and I should mention, shortstops had better range back then.
Fun game today, 3-2 walk-off win. Blake Snell is money. Just watched him throw seven innings, one hit, no walks. He was
scary good...the Twins' batters were missing his pitches by a foot. Ty Rogers had a hold, Doval had his fourth blown save. Gave up two runs, two hits, a walk and got one guy out. Walker came in, shut them down. Move Walker to closer (or Rodriguez), trade Doval.
Best part was Yaz, first pitch, bottom of the ninth, hit a ball into Triples Alley, he runs to third, the SS throws the ball into the dugout and BOOM...he was awarded home. Try to see it if you can.
https://www.mlb.com/news/blake-snell-fli...icle-share
That the Giants' ninth walk-off win, tied for MLB lead.