08/11/2011 08:49 am ET | Updated Oct 11, 2011

Bryce Harper Ejected: Nationals Top Prospect Thrown Out Of Double-A Game (VIDEO)

Bryce Harper, the top position prospect in the Washington Nationals' farm system, made headlines with his mouth instead of his bat on Wednesday night after he got ejected for arguing with the umpire.

The 18-year-old thought he had drawn a walk and started making his way to first base, but umpire Max Guyll called him out on strikes. Harper, who was promoted to the Double-A Harrisburg Senators in early July, slammed his helmet to the ground and Guyll threw him out right away. Harper then approached Guyll and started screaming in his face until Senators skipper Tony Beasley went out to get him.

A month before getting promoted up to Harrisburg from the Single-A Hagerstown Suns, the volatile Harper caused a stir when he taunted an opposing pitcher by blowing him a kiss after launching a home run.