Chavez was drilled in the eighth inning by Red Sox reliever Mark Melancon and fell to the ground before remaining in the game to run the bases, but he was replaced by Jayson Nix at third base for the top of the ninth inning.
X-rays were negative, Chavez said, and he left the stadium wearing a tight wrap. He said Melancon's 92-mph cutter hit him in the top part of his ankle.
"It's fine. It's a lot better than it looks like," Chavez said. "It's just a bruise that got me in a good spot and made it tough for me to walk. They just put the wrap on there to make sure it didn't swell up going to my foot."
The Yankees are already short-handed at third base after Alex Rodriguez broke his left hand on Tuesday in Seattle. Nix will likely start at third base on Saturday against left-hander Jon Lester, and Chavez wasn't sure if he'd be available to pinch-hit if needed.
"I don't know. I'll just come in tomorrow and see how it feels," he said.