“My take is that’s what Marshal has been doing exactly all year,” Harbaugh said. “What they tell you is as long as it’s consistent all year that’s the way it is. You have to have the mechanism to snap the ball with crowd noise. It’s a silent mechanism.

“The fact that they Bears don’t choose to use that one, they have other ways to do it. They do it with their center. Their center is nodding his head all over the place. So, we’re not going to send that in. But the one that Marshal got called for was the same thing he had been doing the whole game.”

Doss’ drops

Wide receiver Tandon Doss was unable to secure two accurate Flacco passes Sunday.

In the fourth quarter, Doss dropped a short pass on third down.  In overtime on third down, Doss couldn’t bring in a pass over the middle that led to a punt with the Bears winning the game on the ensuing possession. Flacco later said he thought Doss might have been interfered with in overtime.

“I couldn’t make the catch at the end to keep things going,” Doss said. “We’ve got to figure out what we need to do to start getting some wins because we’ve got a long season ahead.”

End zone

Reserve cornerback Asa Jackson played in a regular-season game for the first time since his rookie season after completing his eight-game suspension for violating the NFL performance-enhancing drug policy, lining up on the punt return and kickoff teams. “It’s an opportunity I’ve been waiting for since August,” Jackson said. “I was happy to get out there.” … During the nearly two-hour delay and tornado watch Sunday, Harbaugh walked up the tunnel at one point to check out the field. “It almost seemed like a tornado came up the tunnel,”  he said. “They grabbed me to get out of the tunnel, the security guys. They screamed at me. It didn’t take much to get me back up the tunnel.”