Hernandez was diagnosed with a bruised right forearm after he exited Tuesday's Grapefruit League start against the Cardinals, Christina De Nicola of MLB.com reports.
Hernandez was fortunate to avoid a more serious injury after his throwing arm was on the receiving end of a line drive off the bat of Tyler O'Neill that had an exit velocity of more than 105 miles per hour. Assuming Hernandez isn't dealing with too much soreness from the bruised arm during a scheduled bullpen session later in the week, he should still be part of the Marlins' season-opening rotation. Hernandez was tentatively lined up to start the Marlins' third game of the season Sunday in San Francisco, but he could be pushed to the back of the rotation order if manager Don Mattingly wants to give the right-hander more time to heal up.