Washington Nationals super-prospect Bryce Harper injured his right hamstring running the bases in last night's Harrisburg Senators in Akron against the Aeros.  After the Nats 3-1 over the Cincinnati Reds last night, team officials termed the injury a strain and listed Harper as day-to-day.

In the eighth inning of a 4-1 game with Harrisburg in the lead, Harper walked to lead off the inning.  Archie Gilbert doubled to right field, but Harper pulled up lame as he approached third base.  Senators manager Tony Beasley, coaching third base, was the first to reach Harper as he limped into the bag and was quickly joined by a team trainer, who helped Harper off the field gingerly. 

Amateur video showed the two older men supporting Harper on their way off the field, with Harper putting very little pressure on his injured right leg.

Harper finished the night 1-for-3 with a walk.

Should the injury require some time off, the minor leagues have a seven-day disabled list.  But it's also entirely possible that with just a couple weeks left until the culmination of the minor league season, the Nats are overly cautious with Harper and shut him down to get him fully healthy so that the injury does not linger and he can participate in the Arizona Fall League, an instructional league for the baseball's brightest prospects.

Harper is hitting .256/.329/.395 in 37 games with Double-A Harrisburg this season.  Overall, in 387 at bats between Harrisburg and Single-A Hagerstown, Harper is hitting .297/.392/.501 with 17 home runs, 58 RBIs and 26 stolen bases.