Nationals' Harper leaves with apparent knee injury

(Photo by Greg Fiume/Getty Images)

(TSX / STATS) -- WASHINGTON -- Nationals right fielder Bryce Harper, the National League MVP in 2015, left the game in the first inning Saturday night against the San Francisco Giants after his left foot slipped on the first base bag as he tried to beat out a groundball to first baseman Ryder Jones.

On the play, Jones fielded the ball and beat Harper to the bag as pitcher Jeff Samardzija raced over to cover the bag just in case. Harper fell to the ground and held his left knee for several minutes after making the second out.

He was helped off the field and did not put any weight on his left leg as athletic trainer Paul Lessard and hitting coach Rick Schu helped him to the clubhouse.

There was no immediate word on the condition of Harper. The Nationals are one of the few MLB teams that do not provide possible injury information during games.

The start of the game was delayed 3 hours, 1 minute by rain Saturday and there was a light rain in the top of the first inning.

Harper is hitting .326 with 29 home runs and 87 RBIs in 106 games and 402 at-bats for the first-place Nationals.

Rookie Andrew Stevenson came on to play center field in the second and Brian Goodwin moved from center to right.

Updated August 12, 2017