PITTSBURGH -- Washington Nationals pitcher Jorge Lopez was ejected from Wednesday night's 6-1 loss to the Pittsburgh Pirates after a pitch near Andrew McCutchen's head led to the benches briefly clearing.

In the seventh inning, Lopez hit the previous batter, Bryan Reynolds, with a pitch before facing McCutchen, who had to fall to the ground to avoid getting hit by a 92 mph ball near his head.

As the umpires gathered to discuss the incident, McCutchen and Lopez started arguing, which caused both benches to empty. Pirates outfielder Tommy Pham was seen yelling while being held back by teammate Oneil Cruz.

Cruz hit a grand slam later in the inning off Eduardo Salazar to give the Pirates a 6-0 lead.

The Associated Press contributed to this report.