As the Red Sox brace for tonight's opener of an all-important four-game series against the Tampa Bay Rays, David Ortiz is wearing a back brace. And now, Adrian Gonzalez has a balky left calf. After launching a sixth-inning home run yesterday against the Blue Jays, Gonzalez left the game because of tightness in his calf. He said he began noticing the problem after grounding out in the fourth inning. He ruled out dehydration as a possible cause. According to Gonzalez, the decision to come out of the game was mostly precautionary. "They didn't want me to keep going out there and making it worse," he said. "Better play it safe than sorry, I guess."