The two big power sources on the Red Sox are David Ortiz and Mike Napoli. With Ortiz already out, the Red Sox had a brief scare yesterday that Napoli might have to join him. Napoli was hit on the left wrist by a Kevin Slowey pitch in the third inning of the 8-7 loss to the Marlins. Before Napoli completed his slow walk to first base, shaking and holding his hand, he was joined by a trainer and manager John Farrell. Napoli stayed in the game and later passed a strength test, meaning it was not much more than a flesh wound. “Any time you (get) hit around your hand area, it doesn’t take much for something to go wrong,” said Napoli. “At first it was a little numb and then I kind of got feeling back into it.” Farrell said he was relieved only “after he said he was OK — thankfully, nothing there. You hit him in that wrist area and it gets a little dangerous. He came out of it fine.”