The future has arrived for the Nationals.

In the midst of its best start since moving to Washington from Montreal, 19- year-old phenom Bryce Harper will make his much-anticipated MLB debut for the Nationals on Saturday against the Los Angeles Dodgers.

Washington will place third baseman Ryan Zimmerman on the 15-day disabled list to make room for him on the roster.

"We thought that we needed to bring in an impactful left-handed bat," said Nationals general manager Mike Rizzo of Harper.

Harper, the first overall pick in the 2010 draft, batted .286 in nine spring training games for Washington.

In 20 games for Triple-A Syracuse this season, the outfielder hit .250 with one home run and three runs batted in.

Zimmerman, meanwhile, will visit a physician at the Kerlan-Jobe Orthopedic Clinic to likely receive a cortisone shot in his injured right shoulder.