Harbaugh wouldn't say if Reed was playing injured and told reporters to ask Reed personally.
"I've got a lot of confidence in Ed Reed and I'm sure everybody else does," Harbaugh said. "I guarantee that the people who are playing against him, they know where he's at back there. Our coverage in our secondary [Sunday] was excellent. That starts with Ed Reed."
Harbaugh praised Reed's coverage downfield — he mentioned play-action passes in particular — and said he would leave Reed to answer any questions about tackling technique later this week.
"He's been around. He knows how to play. And he'll take care of that," Harbaugh said.
Rice brought attention to Williams' milestone
Starter Ray Rice brought it to Harbaugh's attention in the frenzied locker room and the coach then called Williams into the middle of the circle. The team started chanting, "Ricky! Ricky! Ricky! Ricky!"
"It was really a neat moment, a team moment," Harbaugh said.
Harbaugh said players asked the quiet veteran to give a speech, "but he did not provide one."