Nationals star outfielder Bryce Harper had to be carried off the field in the bottom of the first injury after suffering what appeared to be a gruesome knee injury.
Harper, who was running out a ground ball to first base, slipped on the first base bag while trying to beat out Giants first baseman Ryder Jones.
Harper stayed down for several minutes, clutching his knee.
He was carried off by trainers.
The game had already been delayed for over an hour due to rain, which caused the first base bag to be wet.
Harper entered the game as one of the leading N.L. MVP candidates with 29 home runs and 87 RBI.
The Washington Nationals announced Friday Dusty Baker will not return as manager of the club in 2018.
Baker led the team to the first back-to-back division titles in franchise history, and the Nationals were 192-132 under Baker, but they failed to make it to an NLCS.
Baker is 14th in MLB history with 1,863 career wins.
The next Nationals' manager will be their seventh since they arrived in DC.
Only the Marlins have had as many.
"I'm surprised and disappointed," Baker told USA TODAY Sports. "They told me they would get back to me and I told them I was leaving town yesterday and they waited 10 days to tell me."
"I really thought this was my best year. We won at least 95 games each year and won the division back to back years but they said they wanted to go a different direction. It's hard to understand."
The team also announced the contracts for the Major League coaching staff have also expired, and the search for a new manager will begin immediately.
RELATED: BRYCE HARPER THANKS NATIONALS' FANS FOR SUPPORT
While Nats fans were still digesting the news that Dusty Baker will not return as manager next year, the team released some more surprising news.
Second baseman Daniel Murphy underwent knee surgery today, per an official team report.
Washington Post reporter Chelsea Janes reported that the surgery is considered significant and the team won't put a timeline on the recovery process:
"The procedure, according to the statement released by the team, repaired articular cartilage in Murphy’s right knee. For those interested in the details, it was a debridement and microfracture surgery, and orthopedic surgeon Timothy Kremchek performed it."
"For those concerned with the implications of the procedure, those are still unclear. The statement clarified that Murphy’s rehab “will progress throughout the offseason,” as one would hope, and did not include a timetable.
RELATED: HARPER THANKS FANS FOR SUPPORT