Marlins pitcher Dan Jennings hospitalized after being hit by line drive

In another scary moment on the mound, Miami Marlins pitcher Dan Jennings was hit square on the side of his head by a line drive off the bat of Pittsburgh's Jordy Mercer during a game Thursday night.

Jennings immediately dropped to the ground and spun around before getting up and staring blankly toward third base. The game was immediately stopped in the seventh inning as players and medical staff rushed to Jennings' side.

Jennings raised his hand to acknowledge the crowd as he was carted off the field. The crowd and players from both teams appeared to be affected by the incident.

Jennings was taken to a Pittsburgh area hospital where he underwent a CT scan. He was later diagnosed with a concussion, according to MLB.com.

Major League Baseball has approved use of padded caps to give pitchers a slight bit of protection while standing just over 60 feet from home plate, but only reliever Alex Torres of the San Diego Padres currently uses one such product.

During spring training, Reds closer Aroldis Chapman was struck by a line drive in an exhibition game against the Kansas City Royals and suffered fractures above his left eye, which caused him to miss the first six weeks of the season.