UPDATE, 8:33: Bryce Harper in on the seven-day disabled list at Class AA Harrisburg, a Nationals spokesman said. Harper’s visit to the doctor confirmed the right hamstring strain.

Original post: While Nationals trainers had yet to re-evaluate the strained right hamstring Bryce Harper suffered Thursday night with Class AA Harrisburg, Manager Davey Johnson suggested that Harper will not play again this minor league season, which ends Sept. 5.

“I’m not going to worry a whole lot about Bryce Harper down there with a slightly pulled hammy,” Johnson said. “It’s the end of the season. He probably won’t play the rest of the year. There’s only a few days left. Don’t take a chance of aggravating that into more a serious injury.”

Harper, the 2010 first overall pick and the consensus top prospect in baseball, left Thursday’s game after pulling up lame while running into third base from first on a single. Two teammates helped Harper off the field as he put no weight on his right leg.

Nationals trainers looked at Harper in Harrisburg this evening, and the results have not yet become available. But with only two weeks remaining in the season, the Nationals will likely shut him down until they send him to the Arizona Fall League, which begins Oct. 4.

If Harper’s season is over, he leaves with impressive overall stats, especially for an 18-year-old playing his first professional season. He hit .256/.329/.395 in 37 games at Harrisburg and .318/.423/.554 at Class A Hagerstown, where he was one of the best players in the South Atlantic League. Overall, Harper hit .297/.392/.501 with 17 homers, 24 doubles and two doubles in 387 at-bats.