Miami 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. Read more http://espn.go.com/mlb/story/_/id/1...-released-hospital-day-struck-head-line-drive