What is happening to the Giants right now is truly unbelievable. After posting baseball’s best record in the first half (57-33), the Giants have baseball’s worst record in the second half and it got even worse Wednesday night.

San Francisco took a 5-3 lead into the ninth inning against the Rockies, and closer Santiago Casilla immediately allowed a solo home run to Nolan Arenado. It happens. Arenado is awesome. A single (Tom Murphy) and a hit-by-pitch (Charlie Blackmon) followed, putting the winning run on base.

Manager Bruce Bochy had already replaced Casilla with lefty Josh Osich, and after the Blackmon hit-by-pitch, Bochy turned the game over to former All-Star closer Joe Nathan. That’s how desperate things are for the Giants right now. Colorado eventually walked off on a Cristhian Adames double. To the video:

Boy, that’s rough. The 6-5 walk-off loss (box score) on Wednesday was San Francisco’s fifth loss in their its past seven games. The Giants are 17-32 in the second half. 17-32! Yikes.

At one point this season, the Giants were eight games up in the NL West. It wasn’t even that long ago: June 26. Now the Giants are only a half-game up on a postseason spot. They sit in the first wild-card spot with the Cardinals and Mets tied for the second spot, a half-game back.

Source: CBS Sports / WATCH: Giants’ second-half nightmare continues with walk-off loss to Rockies