The Nationals' star right fielder was diagnosed with a deep bone bruise on the inside of his left knee, and while the team will take it carefully with him, he is expected to return in 2017.
Harper left after his left foot slipped on the first base bag as he tried to beat out a ground ball to first baseman Ryder Jones.
Haper stayed on the ground in serious pain, and had to be helped off the field. Hopefully, the injury looked worse than it really was. Harper clutched at his left knee and didn't put any weight on it as he was helped off the field.
Since Harper made his MLB debut on April 28, 2012, the Nationals have the second-most regular-season wins in baseball (they're 526-397), behind the Los Angeles Dodgers.
Harper is now one of the leaders in the NL MVP race and is hitting.326 with 29 home runs and 87 RBI.
Shortly after the Giants took a 1-0 lead, Washington fought back with a pair of runs in the bottom of the inning off of Giants' starter Jeff Samardzija, but the Nationals won't remember the first inning for the comeback they managed.
The start of the game was delayed 3 hours, 1 minute by rain Saturday and there was a light rain falling as Harper batted in the first. Nationals' general manager Mike Rizzo told reporters that he doesn't believe the injury is season-ending, but doesn't have a clear timetable in mind for Harper's recovery just yet. "He's definitely one of those guys that you can't replace on a team". The top four in their starting rotation have avoided major problems, though Stephen Strasburg is one of Washington's 11 players on the disabled list. "I'm very optimistic that he'll be at least fine shortly", Baker said. He struggled a little early, throwing 23 pitches (only 12 strikes) in the first inning.
Taylor was reinstated from the 10-day disabled list after missing 29 games with a right oblique strain.