UPDATE 8/8/14: Marlins left-hander Dan Jennings was released from a Pittsburgh hospital on Friday, a day after he was hit in the head by a line drive.

Miami put Jennings on the seven-day concussion list. He was expected to fly back to Florida on Friday evening after being released from Allegheny General Hospital. Jennings was hit by Jordy Mercer's liner during the seventh inning of Pittsburgh's 7-2 win.

"Everything checked out fine," manager Mike Redmond said. "The good news is he was cleared to fly home. That tells you a lot about how he's doing."

The Marlins also called up infielder Ed Lucas, right-hander Anthony DeSclafani and left-hander Edgar Olmos from Triple-A New Orleans for the opener of a series against Cincinnati. Left-hander Brian Flynn and infielder Kike Hernandez were optioned.

"Headed home to rest up with my family," Jennings posted on his Twitter account Friday afternoon. "Thanks again everyone for the kind words." 

The Miami Marlins pitcher was hospitalized after being hit in the head by a line drive Thursday night.

Marlins manager Mike Redmond said Jennings' eyes were open and he was responding to questions from the medical staff while on the mound.

After the Marlins' 7-2 loss to the Pittsburgh Pirates, the team announced that a CT scan was negative, but Jennings was diagnosed with a concussion and was kept in a hospital overnight for observation.

Jennings was struck by a liner off the bat of Jordy Mercer in the seventh inning. The reliever momentarily stumbled before going to his knees after the play.

Jennings stood up to get in the cart. He put a hand up to acknowledge the crowd as he was driven away.

After the game, Jennings took to Twitter to announce his condition and acknowledge the support he recived, and the Marlins' Twitter feed gave thanks to the Pirates' staff.

Video of the play is below. Warning: Some viewers may find some of the footage disturbing.