Reed, 31, fumbled away an interception of a third-quarter Peyton Manning pass in the Ravens' 20-3 loss at Indianapolis Saturday.
The interception helped him join Philadelphia cornerback Asante Samuel among active players with seven post-season picks.
Indianapolis wide receiver Pierre Garcon punched the football out of Reed's grip and the Colts recovered it at their 27-yard line.
The play cost the Ravens a potential scoring opportunity, and Reed, a six-time Pro Bowl selection, says it keeps him from making "an emotional" decision about his future.
"You make a pick and turn it over," Reed told reporters after the loss. "You can't do that. You've got to give our offense a chance to score."
He added a groin injury that cost him four games this season likely will impact any decision he makes.
"We'll see. I take good advice from my doctors."