Harper, 18, played his last game this year Aug .18, when he strained his hamstring trying to run from first base to third on a base hit. He had to be helped off the field and the next day was placed on the 7-day disabled list. Harper hoped to return for the postseason and the Nationals viewed him as day-to-day, but Harper will not be able to play.

Harper’s next action should come in the Arizona Fall League, which begins Oct. 4. Harper played in the Fall League last year as a “taxi squad” player, meaning he played only on Wednesdays and Sundays. Harper will be a full participant this year.

In 109 total games with Class A Hagerstown and Harrisburg, Harper hit .297/.392/.501 with 17 homers and 24 doubles in 387 at-bats. He dominated in Hagerstown and had more trouble adjusting to Class AA pitching, hitting .256/.329/.395 in with three homers in 37 games at Harrisburg. For an 18-year-old and the youngest player in the league, those numbers are still impressive.